grade 7 family resources grade... · text: “stinging tentacles offer hint of oceans’ decline”...

Grade 7

Family Resources

Week 7

May 6- May 13

English

Language

Arts

GRADE 7 WEEK 7

7th Grade Week 7

New Learning

Learning Summary Students will use their Close Reader and Performance Assessment to complete 30 minutes of literacy work each day.

Reading

Text: “Stinging Tentacles Offer Hint of Oceans’ Decline” pages 67-74 [Close Reader] Task 1:

• Read and respond to questions 1,3, 5,7, and 8.

• Define the vocabulary words in the margin. Task 2:

• Re-read and respond to questions 2, 4,6, and 9.

Reader Response

Text: “Stinging Tentacles Offer Hint of Oceans’ Decline” pages 67-74 [Close Reader] Task 1:

• Answer the Short Response question on page 74. Be sure your summary explains the cause and effects of the growing population of jellyfish. Provide text evidence as support.

Comprehension Strategies

Task 1:

• Using evidence from the text, explain what the author’s purpose is for writing this essay.

Task 2:

• Explain what the growing number of jellyfish tells us about the health of the world’s ocean. How does this knowledge influence solutions to protect beaches?

Independent Reading

• Read self-selected text for an additional 30 minutes each day.

Writing Performance Assessment

Argumentative Essay pages 99-107 [Performance Assessment] Task 1: Read pages 99-107. Make notes in the margin that identify the arguments for and against public workers having the right to strike. Task 2: Answer the Part 1 questions on page 107 Note: Part 2 will be completed next week

Other

Enrich your Learning with Collections Online Resources Online District Learning Apps, HMH Collections

• Student Resources Tab on Collections Dashboard

o Level Up Tutorial-Reading Skills and Strategies: Main Idea and

Supporting Details

o Level Up Tutorial- Reading Skills and Strategies: Summarizing

o Xplor eMagazine: Collection 4, “Deep Sea Robot” and “Sea-Fever”

English Language Arts At-Home Learning

Students

with

Individual

Educational

Plans

GRADE 7 WEEK 7

7th Grade Week 7

New Learning

Learning Summary Students will use their Close Reader and Performance Assessment to complete 30 minutes of literacy work each day. Accommodation: Break into chunks manageable for student Allow student to take frequent five minute breaks before coming back to work

Reading

Text: “Stinging Tentacles Offer Hint of Oceans’ Decline” pages 67-74 [Close Reader] Accommodations: See Reading and writing accommodations below Task 1:

Read and respond to questions 1,3, 5,7, and 8. Central idea is the main idea…what is the paragraph mostly talking about?

1. Sentence Starter: The central idea of paragraph… 3. Remember: Cause is the reason something happens; effect is what happens because of the reason. Use the cause and effect chain (included in packet) to keep track. 5. Option to use a separate sheet of paper to list steps 7. Sentence Starter: The first expert… The second expert… 8. Antonio Lopez states…

Define the vocabulary words in the margin. Accommodations: Use a notebook to keep track of vocabulary; Partner read the passage with student reading at least a paragraph at a time; After each paragraph stop and talk about what you just read Highlight instead of circle and underline (highlight different items in different colors). Task 2:

Re-read and respond to questions 2, 4,6, and 9. Accommodations: See reading and writing below

2. Remember a summary includes the important details about what is eing summarized. Usually answering who, what, when, where, why and how.

4. Remember, a paraphrase is stating what is already said, but in a different way. Example, Brian said, “Jill, you are radiant. Your eyes shine like moonbeams.” Paraphrase: Brian told Jill that he thought she was beautiful.

6. Evaluate means to give value to something. Are Dr. Gili’s team doing enough to protect the beaches? Is what they are doing a short term fix or will it help for a long time (long-term)? Give evidence for how you know… 9. Antonio Lopez states…

GRADE 7 WEEK 7

Reader Response

Text: “Stinging Tentacles Offer Hint of Oceans’ Decline” pages 67-74 [Close Reader] Accommodations: See writing accommodations below Task 1:

Answer the Short Response question on page 74. Be sure your summary explains the cause and effects of the growing population of jellyfish. Provide text evidence as support.

Sentence Starter: In this passage, the growing problem of jellyfish is…(provide your evidence as support for what you are stating)…this is evidenced by…

Comprehension Strategies

Task 1: Accommodations: See writing accommodations below.

What is the author’s purpose for writing this essay? Provide evidence from the text to support your answer.

Sentence Starter: The author’s reason or purpose for writing this essay… Task 2:

Explain what the growing number of jellyfish tells us about the health of the world’s ocean. How does this knowledge influence solutions to protect beaches?

Answer one question at a time… 1. The growing number of …. 2. This knowledge influences…

Independent Reading

Read self-selected text for an additional 30 minutes each day. Remember this can be broken up into small increments. Accommodations: Bookshare (Audio Books) Partner Read

Writing Performance Assessment

Argumentative Essay pages 99-107 [Performance Assessment] Task 1: Read pages 99-107. Make notes in the margin that identify the arguments for and against public workers having the right to strike. Accommodation: Use For or Against Matrix (included in packet) Task 2: Answer the Part 1 questions on page 107 Accommodations: See writing accommodations below Sentence starters: Ed Ott states… the following evidence supports his claim: Additionally, Mia Lewis supports this by… Note: next week you will complete part 2 of the essay.

Accommodations

Reading: Partner read with student reading at least five sentences at a time. High light answers/evidence in the text Have student restate what he/she heard/read at the end of each paragraph Writing: Access to Word through Office 365 for all writing assignments. - speech to text to write (microphone) -text to speech to hear read back. (search “immersive reader” to activate) -Editor options (looks dark blue with lines to the right) will allow you to decide which editing you would like to have automatically.

GRADE 7 WEEK 7

Use of sentence starters at the end of each section above. Use the graphic organizers provided in these sections

Other

Online District Learning Apps, HMH Collections HMH Collections: Will read passages Bookshare: Audio books for Collections and independent reading…will read stories and items to students Achieve 3000-Cause and Effect (Reads at student’s individual levels): Article at one level : Foxes, Fires, and Cats-Oh My!

English Language Arts At-Home Learning

4/23/2020 Achieve3000: Lesson

https://portal.achieve3000.com/kb/lesson/do_print?lid=16605&c=1&step=all&pagebreaks=1 1/13

People brought animals to Australia from other places. These animals were helpful to people. But they alsocaused new problems. What do you think?

Printed by: Laura LindhPrinted on: April 23, 2020

Foxes, Fires, and Cats—Oh My!

Before Reading Poll

People should not change the environment.

Agree

Disagree

Explain why you voted the way you did.



Photo credit and all related images:AP/Department of the Environment,

C. PotterA wild cat catches a bird in Australia.Wild cats and red foxes brought intoAustralia are causing other animals

to die out.

Article

SYDNEY, Australia . Australia has hundreds of species of land mammals.But a new study shows that many of these animals are going extinct.Scientists weren't sure why this happened. They wanted to find out.

Scientists began by tracking Australia's land mammals since 1788. That'swhen the first European settlers arrived. At that time, there were 273 landmammal species in Australia. Since then, 11 percent of those species havegone extinct. That's one or two species every 10 years. Why did thishappen? Scientists found a few causes.

The first cause is new species. Many animals began to die out after twonew species came to Australia. The feral cat was one of these animals.The red fox was the other one. Settlers brought these animals to Australia.Sailors brought the cats. The feral cats helped lower the number of rats ontheir ships. Also, settlers liked fox hunting. Australia did not have foxes. Sothey brought their own.

These two species created a problem. The feral cats and red foxes hunted many of Australia's small mammals. Thenumbers of cats and foxes grew. Seven species of land mammals once common on the Australian mainland now liveonly on islands. Why? The cats and foxes don't yet live on these islands.

However, the cats and foxes are not the only problem. Scientists found a second reason so many animals were goingextinct: wildfires.

Australians used to set small fires. This was to burn dry brush. That way, wildfires could not spread. Today, fewer smallfires are set. This means that more wildfires spread. This leads to a loss of hiding places for small mammals. So theanimals can't protect themselves from cats and foxes.

Information for this story came from AP.

Dictionary

brush (noun) small plants, trees, and bushes covering the land

extinct (adjective) no longer living anywhere in the world

feral cat (noun) a cat that lives in the wild

mammal (noun) an animal that makes milk to feed its babies

settler (noun) someone who comes to a new place to stay and finds land to live on



Activity

PART 1

Question 1

Think about the news story. Which fits best in the empty box above?

A new study showed that the way people deal with wildfires has changed.

Settlers brought feral cats and red foxes to Australia long ago.

A study showed why some of Australia's animals are dying out.

Wildfires make it hard for small mammals to find hiding places.

Question 2Think about the news story. Why did settlers bring red foxes to Australia?

To use in fox hunting

To kill many small mammals

To help lower the number of rats on their ships

To share with the people who lived in Australia

Question 3



Which two words from the news story have almost opposite meanings?

Scientist and Australian

Track and find

Fewer and more

Mammal and fox

Question 4The reader can tell from the news story that __________.

If foxes moved to Australia's islands, land mammals there would be in danger.

Rats are much more of a danger to land mammals than feral cats are.

Fox hunting is the favorite activity for people who live in Australia today.

If Australia has more wildfires, land mammals will leave the mainland.

Question 5Karson wants to read more about European settlers in Australia. He would find most of the information __________.

In a history book

In a hunting guide

In a travel guide

In a science book

Question 6The news story says:

Seven species of land mammals once common on the Australian mainland now live only on islands. Why?The cats and foxes don't yet live on these islands.

Which must mean the opposite of common, as it's used above?

Healthy

Unusual

Pleasant

Loose

Question 7



Which sentence from the news story tells why some land animals in Australia have gone extinct?

Australia has hundreds of species of land mammals.

Scientists began by tracking Australia's land mammals since 1788.

Australians used to set small fires.

Many animals began to die out after two new species came to Australia.

Question 8Which question is not answered by the news story?

Why did European settlers bring feral cats to Australia?

Which seven animals now live only on Australia's islands?

Why did Australians used to set small fires?

When did European settlers arrive in Australia?



Now that you have read the article, indicate whether you agree or disagree with this statement.

After Reading Poll

People should not change the environment.

Agree

Disagree



Thought Question

Explain why animals are dying out in Australia. What caused this problem? Use facts from the news story in your answer.

Type your answer in the box below.



OPINION STATEMENT: People should not change the environment.

Poll Results

BEFORE READING AFTER READING

HOW YOU VOTED

Agree Agree

Disagree Disagree

WORLDWIDE RESULTS

Agree 75% Agree 74%

Disagree 25% Disagree 26%

21% changed their opinion after reading the article.



Math

PART 1

A feral cat gave birth to three kittens. The next year, the same cat gave birth to six kittens. How many more kittens did thecat give birth to in the second year than in the first year?

9 kittens

3 kittens

6 kittens

5 kittens



Photo credit and all related images:AP/Department of the Environment,

C. PotterA feral cat catches a crimson rosella

bird in Australia. Researchers saythat much of the Australian species'

decline coincided with theintroduction of two animals: the feral

cat and the red fox.

Stretch Article

SYDNEY, Australia . For thousands of years, Australia's plains, plateaus,and coastlines have swarmed with hundreds of species of land mammals.A new study, however, has revealed that many mammals in the "land downunder" are going extinct. The main culprits appear to be a couple of non-native species with big appetites.

The study was conducted by researchers at Australia's Charles DarwinUniversity. They attempted to pinpoint the scope of the extinction problemand its possible causes. What did they find? The researchers were awarethat Australia was losing some of its land mammal species. Still, they weresurprised by the staggering numbers they found.

The researchers began by tracking the fate of Australia's land mammalssince 1788. This was when the first European settlers arrived. At that time,there were 273 land mammal species endemic to Australia. Since then, thestudy showed, 11 percent of those species have gone extinct. That's a rateof one to two species per decade. An additional 21 percent meet thequalifications of "threatened species" as outlined by the International Unionfor Conservation of Nature. Another 15 percent meet the qualifications forlisting as "near-threatened species."

"We knew it was bad," said John Woinarski. Woinarski is one of the study's authors. "But I think our tallies were muchworse than previously thought."

So what's causing Australia's land mammals to die out?

Many populations of Australian land mammals began declining after the introduction of two non-native species to thecontinent by settlers: the feral cat and the red fox. The cats were introduced to Australia by sailors. They brought thefelines on their ships to keep the onboard rat populations at bay. The red foxes were brought by settlers. The settlershad realized that in order to participate in one of their favorite sports—fox hunting—in their new home, they'd have tobring the foxes themselves.

Australia's two newest species, however, created a problem for those already there.

The feral cats and red foxes turned out to be aggressive predators of many of Australia's small mammals. As the catand fox populations grew, native mammal populations declined. Researchers noted that seven species of landmammals that were once widespread on the Australian mainland now live only on islands that the cats and foxes haveyet to colonize.

The researchers found, however, that the cats and foxes are not entirely to blame for the high extinction rate. A separatecause is the changing way in which the nation's often-fierce wildfires are managed.

In the past, native Australians routinely set small fires to burn away the dry brush that can serve as tinder for wildfires.But that practice is less common today. As a result, wildfires start more often. They also spread more widely. This leadsto a loss of the food sources and hiding places that protect small mammals from cats and foxes.

Stuart Pimm is a Duke University biologist and expert on present-day extinctions. Pimm called the study both thoroughand important. It finally nails down the scope of Australia's extinction problem—and the reasons behind it, he said.



"[The study] tells us that by being careless, particularly with invasive species, that we can do an extraordinary amount ofenvironmental harm, even in places where there aren't a lot of people," Pimm said.

Australia's experience, Pimm added, should serve as a warning to everyone.

"There are parts of the world where invasive species have gone [wild]. That tells us we need to be very careful not tobring in any more to do any more harm," he said. "We need to be better stewards [of the environment] so that we canshare these wonderful animals with our children and grandchildren."

The Associated Press contributed to this story.

Dictionary

aggressive (adjective) unfriendly, forceful, and combative

culprit (noun) the cause of a problem

endemic (adjective) abundant and widespread in a particular area

extraordinary (adjective) beyond the usual

scope (noun) range; extent



Stretch Activity

PART 1

Question 1

The best alternate headline for this article would be _________.

Feral Cats Were Introduced to Australia by Sailors

Australian Study Proves Settlers Hunted With Foxes

Staggering Numbers of Land Mammals Live in Australia

Study Looks at Reasons for Decline of Australian Land Mammals

Question 2According to the article, why did settlers bring red foxes to Australia?

The settlers realized that the number of small mammals in Australia were in decline and thought that the foxes would huntthese animals' predators.

The settlers brought the foxes on their ships as they traveled to Australia in order to keep the onboard rat populations at bay.

The settlers were fond of fox hunting and realized that in order to fox hunt in their new home, they'd have to bring the foxesthemselves.

The settlers wanted to reduce the number of feral cats in Australia and hoped that the foxes would help them to achieve thisgoal.

Question 3Which would be the closest synonym for the word extraordinary, as it's used in this article?

Extreme

Perplexing

Approximate

Expected

Question 4The reader can infer from the article that __________.

Australian officials are making plans to introduce different non-native species to the continent.

Australian officials would like to see more land mammal species meet the criteria for listing as "near-threatened."

Scientists were completely surprised with the results of the study about Australia's native land mammals.

Scientists thought it was important to look at both environmental and human causes of Australia's land mammal decline.

Question 5



This article would be most useful as a source for a student research project on __________.

The positive impacts of wildfires

The effect of non-native species on an island

Careers in the environmental sciences

Common challenges in research studies

Question 6The article states:

The feral cats and red foxes turned out to be aggressive predators of many of Australia's small mammals.As the cat and fox populations grew, native mammal populations declined.

Which would be the closest antonym for the word declined?

Weakened

Collapsed

Wavered

Increased

Question 7Which passage from the article best supports the idea that the results of the study were unsettling for researchers?

The researchers began by tracking the fate of Australia's land mammals since 1788.

The study was conducted by researchers from Australia's Charles Darwin University. They attempted to pinpoint the scope ofthe extinction problem and its possible causes.

The researchers found…that the cats and foxes are not entirely to blame for the high extinction rate.

The researchers were aware that Australia was losing some of its land mammal species. Still, they were surprised by thestaggering numbers they found.

Question 8Which question is not answered by the article?

What has changed about the management of wildfires in Australia?

Why do some feel that the study about land mammal decline in Australia is important?

How did feral cats come to populate the Australian mainland?

How many red foxes were brought to Australia by settlers for the sport of fox hunting?

Graphic Organizer

Cause and

Effect Chain

Title:

1. Write the first cause in the first Cause box. 2. Write what happened in the second box. This now becomes the cause of the next effect and so on. 3. Add more boxes if you need them.

Cause > Effect Cause > Effect Cause > Effect

Cause: Why something happens Cause > Effect: What happens because of the Cause.

Cause > Effect

Graphic Organizer

For and Against Matrix

Title:

Use this matrix to compare two positions. State each position as clearly as you can. Explain the support for each position as well as who supports each position.

1. Arguments for Strike

2. Arguments Against Strike

State Position 1: Public Workers have a right to strike State Position 2: Public workers do not have a right to strike

Support or evidence that proves they have a right to strike. Support or evidence that supports that they do not have a right to strike.

Additional support or evidence that proves they have a right to strike.

Support or evidence that they do not have a right to strike.

Original content Copyright © by Houghton Mifflin Harcourt. Additions and changes to the original content are the responsibility of the instructor.

Mathematics


Generating Random Samples

Success

Problem 1

How many free throws are made out of 10 attempts by each eighth-grade

physical education class team?

“Good” free throws by eighth-grade teams:

5 1 10 9 5 1 9

9 9 4 8 8 9 1

7 10 7 9 7 4 1

4 1 5 6 2 4 3

4 6 6 5 4 7 2

6 3 9 9 5 4 2

Results of drawing three of the slips of paper: Teams 20, 29, and 12

Free throws by team in the samples:

Team 20 4 goals

Label the teams from 1 to 42 on slips of paper.

1st row: 1 7, 2nd

row: 8 14, etc.

Find 3 random samples. How? Calculator? Number cubes? Spinners?

LESSON

10-3


Team 29 4 goals

Team 12 8 goals

1. How many teams got 4 goals? 2. How many teams got 8 goals?

_______________________________________ ________________________________________

3. What number of goals appears most? 4. What number of goals appears least?

_______________________________________ ________________________________________

Generating Random Samples

Reteach

A random sample of equally-likely events can be generated with

random-number programs on computers or by reading random

numbers from random-number tables in mathematics textbooks that

are used in the study of statistics and probability.

In your math class, random samples can be modeled using coins or

number cubes. For example, consider the random sample that consists

of the sum of the numbers on two number cubes.

Example 1

Generate 10 random samples of the sum

of the numbers on the faces of two number

cubes.

Solution

Rolling the number cubes gives these

random samples:

2, 6, 6, 4, 3, 11, 11, 8, 7, and 10

Example 2

What are the different possible outcomes from

rolling the two number cubes in Example 1?

Write the outcomes as sums.

Solution

List the outcomes as ordered pairs:

(1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6),

(2, 1), (2, 2), (2, 3), (2, 4), (2, 5), (2, 6),

(3, 1), (3, 2), (3, 3), (3, 4), (3, 5), (3, 6),

(4, 1), (4, 2), (4, 3), (4, 4), (4, 5), (4, 6),

(5, 1), (5, 2), (5, 3), (5, 4), (5, 5), (5, 6),

(6, 1), (6, 2), (6, 3), (6, 4), (6, 5), (6, 6)

Then, write the sums of the ordered pairs:

2, 3, 4, 5, 6, 7, 3, 4, 5, 6, 7, 8, 4, 5, 6, 7, 8,

9, 5, 6, 7, 8, 9, 10, 6, 7, 8, 9, 10, 11, 7, 8, 9,

10, 11, and 12

LESSON

10-3


Example 3

How do the frequency of the outcomes of

the 10 random samples in Example 1

compare with the frequency of their sums in

Example 2?

Solution

In Example 1, there is one each of 2, 3, 4,

7, 8, and 10, two 6’s, and two 11’s. In

Example 3, there is one 2, two 3’s, three

4’s, four 5’s, five 6’s, six 7’s, five 8’s, four

9’s, three 10’s, two 11’s, and one 12.

Answer the questions about the examples.

1. How do the random samples compare 2. How do you think the outcomes in 100

with the predicted number of outcomes? random samples would compare with

the expected results?

_______________________________________ ________________________________________

Comparing Data Displayed in Dot Plots

Success

Problem 1

What is the mode?

What is the median?

The median is 13.

Problem 2

What is the outlier?

The outlier is 7.

What is the mean of all of the data? (1 3 2 2 3 4 1 4 1 7) 11

The mean is about 2.7.

LESSON

11-1

Which value appears

the most often? 11 is

the mode.

What is the “middle” value?

There are 13 numbers, so

the 7th number is the middle.

The outlier is much larger or smaller than the rest of the values.


What is the mean without the outlier? (1 3 2 2 3 4 1 4) 10

The mean is about 2.3.

1. How would you find the median in Problem 1 if there were 12 dots?

________________________________________________________________________________________

2. What would the mode be in Problem 2 if both “1” and “3” had

four dots?

________________________________________________________________________________________

Comparing Data Displayed in Dot Plots

Reteach

A dot plot is a visual way to show the spread of data. A number line is

used to show every data point in a set. You can describe a dot plot by

examining the center, spread, and shape of the data.

This dot plot shows a symmetric distribution of data. Recall that

symmetric means that the two halves are mirror images. In a

symmetric distribution, the mean and median are equal.

• The data are symmetric about the center, 5.

• The median has the greatest number of data.

• The mean and the median are both 5.

Some data sets may cluster more to the left or right. The mean and the

median for data that are clustered this way are not necessarily equal.

This dot plot shows data that are clustered to the left.

LESSON

11-1


• The data are not symmetric.

• The mean, about 3.4, is more than the median, 2.

Describe the shape of the data distribution for the dot plot.

1.

________________________________________________________________________________________

________________________________________________________________________________________

Solving Percent Problems

Essential Standard Practice/Review

Solve.

1. 22 is ____% of 55. 2. 24 is 40% of ____.

3. 15% of $9 is $_________________. 4. 12 is ____ % of 200.

5. 30% of _______ is 60 6. 45 is _____% of 50.

6. Yesterday, Bethany sent 60 text messages. She said that 15% of those

messages were to her best friend. How many text messages did Bethany

send to her friend yesterday?

________________________________________________________________________________________

7. In a survey, 27% of the people chose salads over a meat dish. In all,

81 people chose salads. How many people were in the survey?

________________________________________________________________________________________

8. The sales tax on a $350 computer is $22.75. Find the sale tax rate?

________________________________________________________________________________________

Use the circle graph to complete Exercises 8–12.

9. If 6,000 people voted in the election, how many were

from 18 to 29 years old?

_____________________________________


10. If 12,000 people voted in the election, how many were

from 50 to 64 years old?

_____________________________________

11. If 596 people voted in the election, how many were

over 65 years old?

_____________________________________

12. Suppose that Sahil knows that 45 people with ages of

18 to 29 voted. Without using a calculator, he quickly

says then 135 people with ages of 30 to 49 voted. Is

he correct? How might Sahil have come up with his

answer so quickly?

________________________________________________________________________________________

________________________________________________________________________________________

Exit Ticket

Lesson 10-3

1. A random sample of 50 was taken from a

shipment of 12,000 light bulbs. There

were 2 broken bulbs in the sample. How

many broken bulbs would you expect in

the entire shipment?

A 240 C 2,400

B 480 D 4,800

2. A toy company uses a random sample to

simulate 10 toys to inspect out of 1,000.

The integers 1 to 5 represent toys that are

below standard.

76 68 32 2 14

35 93 61 21 51

Based on this sample, how many toys will

be below standard?

A 1 C 10

B 5 D 100

Lesson 11-1

Use the dot plots for 1 and 2.

Name _______________________________________ Date __________________ Class __________________


The dot plots show exam scores for

25 students.

1. Which exam has an outlier?

A Semester 1 C both exams

B Semester 2 D neither

2. What are the medians for the Semester

1 exam and the Semester 2 exam?

A 75 and 79.8 C 85 and 80

B 75 and 80 D 95 and 100

Use this random sample for 3-5.

Library Items Checked Out

2, 3, 13, 3, 2, 2, 3, 6, 1, 2, 6

3. Make a dot plot to display the data.

4.Find the range, mode, and median.

________________________________________

5.What effect would the outlier have on the

mean?

KEY

LESSON 10-3

Success

1. 7 teams

2. 2 teams

3. 9 goals; 8 times

4. 3, 8, and 10 goals; 2 times each

Reteach

1. Answers will vary, but students should observe that in both outcomes, there are more 6’s than most of the other numbers.

2. Answers will vary, but students may infer that the random sample outcomes will become more like the predicted results as the number of random samples increases.

LESSON 11-1

Success

1. If there are 12 dots, the median is the average of the 6th and 7th dots’ values.

2. There would be two modes, “1” and “3.”

Reteach

1. Answers will vary. The data are not symmetric about the center. The distribution is skewed slightly to the right. The mode is 6, the median is 6, and the range is 10.

Name _______________________________________ Date __________________ Class __________________


Essential Standard Practice/Review

1. 40

2. 60

3. $1.35

4. 6

5. 200

6. 90

7. 9 text messages

8. 300 people

9. 6.5%

10. 600 people

11. 4,200 people

12. 149 people

13. Yes, Sahil is correct; Possible answer: He knew that 30% is 3 times 10%, so he just multiplied 45 by 3

Students

with

Individual

Educational

Plans

Modifications and Accommodations

GRADE 7 WEEK 7

7th Grade Week 7 Math

New Learning

Learning Summary Students will generate random samples. Students will solve using percent. Students will compare data displayed in dot plots.

Accommodations

Break into chunks manageable for student

Allow student to take frequent five minute breaks before coming back to work

Use multiplication table

Read questions to student.

Use Bookshare to read aloud items in the curriculum

Do every other problem instead of all problems

Circle the question words.

Highlight words that you don’t know. Look up the meaning of the words.

Other

Use Go Math on HMH district app to watch videos

IXL to practice skills

Reading Strategies worksheet (Dot Plot) to help with vocabulary.

Quizlet to work on vocabulary

Khan Academy on district apps Random Sample: https://youtu.be/acfjqWTwee0 Percent: https://youtu.be/TvSKeTFsaj4 Dot Plot: https://youtu.be/gdE46YSedvE

https://youtu.be/acfjqWTwee0

https://youtu.be/TvSKeTFsaj4

https://youtu.be/gdE46YSedvE

Name ________________________________________ Date __________________ Class __________________


234

Generating Random Samples Practice and Problem Solving: D

Answer the questions below. Part of the first one is done for you.

1. A rancher�s herd of 250 cattle grazes over a 40-acre pasture. He would like to find out how many cattle are grazing on each acre of the pasture at any given time, so he has some images of the pasture taken by the state department of agriculture�s aerial photography division. Here are the number of cattle found in three one-acre sections.

Sample 1 4

Sample 2 1

Sample 3 9

a. What can the rancher conclude from these samples about how many cattle graze on each acre of the 40-acre pasture?

_____________________________________________________________________________________

_____________________________________________________________________________________

b. If the cattle were equally �spread out� across all of the 40 acres, how many cattle would you expect to find on each acre?

_____________________________________________________________________________________

_____________________________________________________________________________________

c. Why could the sample collected above differ from the number you would expect on each acre of pasture land?

_____________________________________________________________________________________

_____________________________________________________________________________________

2. The manager of a warehouse would like to know how many errors are made when a product�s serial number is read by a bar-code reader. Six samples of 1,000 scans each are collected. The number of scanning errors in each sample of 1,000 scans is recorded: 36, 14, 21, 39, 11, and 2 errors

a. Find the mean and the median number of errors per 1,000 scans based on these six samples.

_____________________________________________________________________________________

Just to be sure, the manager collects six more 1,000-scan samples with these results:

33, 45, 34, 17, 1, and 29 errors

b. Find the mean and the median number of errors based on all 12 samples. How do your answers compare to your answers in part a?

_____________________________________________________________________________________

LESSON

10-3

Sample answer: There could be as few as one or as many as 9 cattle

grazing on an acre, or an average of about 5 cattle grazing per acre.

Name ________________________________________ Date __________________ Class __________________


243

Comparing Data Displayed in Dot Plots Reading Strategies: Understanding Vocabulary

Central measures of a data set should be used that give the most accurate picture of how the data are distributed. This can have an effect on how one data set compares to another.

Mean, Median, and Mode

These three central measures are used most often in describing a data set. However, depending on how the data are distributed, one measure can be more accurate than another.

Example

Mean Add the values and divide by the number of values.

(2 3 4 4 1 5 3 6 1 9) 11 4.9

Mode Occurs most frequently: 4

Median The “middle” value: 4

Two of the central measures have the same value, but the third is larger. This is often caused by an outlier data value that is much larger or smaller than most of the data values. The outlier also has an effect on the range, another measure of how widely data values are distributed. The outlier has an effect on the mean, too.

Outlier 9 Range 9 3, or 6

Without the outlier, the range would be 3 and the mean would be 4.5.

Find the central measures with and without the outlier.

1. With the outlier 2. Without the outlier

________________________________________ ________________________________________

LESSON

11-1


355

6. Population: all schools in the system; Sample: different numbers of schools in each of three categories. It is not stated why the system’s schools are separated into these categories, even though it is sensible. It is not stated why 10, 5, and 5 schools in each category were selected, or if they were randomly selected.

MODULE 11 Analyzing and Comparing Data LESSON 11-1

Practice and Problem Solving: A/B 1. 7; 25; 25 2. 0.07; 0.15; 0.15 and 0.16 (bi-modal

distribution) 3. Both are 3. 4. Plot A has 7 dots; plot B has 9 dots. 5. Plot A’s mode is 21; plot B’s mode is

23 and 24 (bi-modal). 6. Plot A’s median is 21; plot B’s median

is 23. 7. Plot A is skewed to the left so its central

measures are shifted toward the lower values. Plot B is skewed to the right so its central measures are shifted toward the higher values.

Practice and Problem Solving: C 1. The median is 21 pounds, the mode is

22 pounds, and the range is 9 pounds. 2. By both central measures median and

mode, each shearing does not produce the 25 pounds he needs.

3. The median is 25 pounds, but the mode is 24 pounds. The range is 9 pounds.

4. The distribution is “almost” bi-modal with 24 and 27 pounds. Because of this and the fact that the median is 25 pounds, the rancher should feel confident that he is very close to the 25 pound target. If he needs more data, he could sample a larger population to see how its measures compare to the 50-animal sample.

Practice and Problem Solving: D 1. 15 2. 15

3. 15 4. Plot Y; Plot X range is 13 11 2. Plot Y

range is 42 6 36 5. Plot X; 4 values of 11 6. 11 7. 30

Reteach 1. Answers will vary. The data are not

symmetric about the center. The distribution is skewed slightly to the right. The mode is 6, the median is 6, and the range is 10.

Reading Strategies 1. Mean: 6.9; median: 7; mode: 7 2. Mean: 7.3; median: 7; mode: 7

Success for English Learners 1. If there are 12 dots, the median is the

average of the 6th and 7th dots’ values. 2. There would be two modes, “1” and “3.”

LESSON 11-2

Practice and Problem Solving: A/B 1.

2. Amy 3. Ed 4. Ed 5. Amy; The range and interquartile range

are smaller for Amy than for Ed, so Amy’s test scores are more predictable.

6. Port Eagle 7. Port Eagle 8. Surfside; The interquartile range is smaller

for Surfside for than for Port Eagle, so Surfside’s room prices are more predictable.

Practice and Problem Solving: C

1.

2. It increases the interquartile range by 1. 3. The range is more affected since the

difference is 16.

Name ________________________________________ Date __________________ Class __________________


241

Comparing Data Displayed in Dot Plots Practice and Problem Solving: D

Answer the questions for each dot plot. The first one is done for you.

1. What is the range of the data? ___________

2. Since there is an even number of dots, the median is halfway between the values of the two middle data points. What is the median?

________________________________________

3. The mode is the value of the data point that appears the most often. What is the mode?

________________________________________

Answer the questions about the two dot plots.

Plot X Plot Y

4. Which data set has the larger range? Explain.

_________________________________________________________________________________________

5. Which data set has the mode with the most equivalent elements, or dots? Explain.

_________________________________________________________________________________________

6. What is the median of Plot X?

_________________________________________________________________________________________

7. What is the median of Plot Y?

_________________________________________________________________________________________

LESSON

11-1

15

1

2

3

4

5

6

7

8

9

10

11

12

2

4

6

8

10

12

14

16

18

20

22

24

3

6

9

12

15

18

21

24

27

30

33

36

4

8

12

16

20

24

28

32

36

40

44

48

5

10

15

20

25

30

35

40

45

50

55

60

6

12

18

24

30

36

42

48

54

60

66

72

7

14

21

28

35

42

49

56

63

70

77

84

8

16

24

32

40

48

56

64

72

80

88

96

9

18

27

36

45

54

63

72

81

90

99

108

10

20

30

40

50

60

70

80

90

100

110

120

11

22

33

44

55

66

77

88

99

110

121

132

12

24

36

48

60

72

84

96

108

120

132

144

13

26

39

52

65

78

91

104

117

130

143

156

13 26 39 52 65 78 91 104 117 130 143 156 169

Multiplication Table 13

Copyright 2012-2013 by Education.com More worksheets at www.education.com/worksheets © 2007 - 2020 Education.comFind worksheets, games, lessons & more at education.com/resources


354

4. Answers will vary, but students should notice that the extreme values of the number of galaxies are 1 and 30. Students might use groups of 10 for a range, e.g. 11 to 20, 21 to 30 etc. in which case students might observe that there are 12 samples between 1 and 10, 9 samples between 11 and 20, and 15 samples between 21 and 30, inclusive.

Practice and Problem Solving: D

1. a. Answers will vary. Sample answer: There could be as few as one or as many as 9 cattle grazing on an acre, or an average of about 5 cattle grazing per acre.

b. If 250 cattle are divided by 40 acres, an average of about 6 cows should be grazing on each acre.

c. Answers will vary. Sample answer: some of the pasture might not have enough food for the cattle, or there might be parts of the pasture that provide food, such as bare ground, creeks, or other such features.

2. a. mean: 20.5 errors; median: 17.5 errors

b. mean: 23.5 errors; median; 25 errors; The mean for all 12 samples was 3 errors more than the mean for the first 6 samples. The median for all 12 samples was 7.5 errors more than the median for the first 6 samples.

Reteach 1. Answers will vary, but students should

observe that in both outcomes, there are more 6�s than most of the other numbers.

2. Answers will vary, but students may infer that the random sample outcomes will become more like the predicted results as the number of random samples increases.

Reading Strategies 1. Answers will vary. Sample answer: These

results are close to what the farmer wants, even if they are a percent less.

2. Answers will vary. Sample answer: The numbers 1, 3, and 5 are representative of the number of females in all 18 litters. One female occurs four times, 3 females occurs three times, and 5 females occurs two times.

Success for English Learners

1. 7 teams

2. 2 teams

3. 9 goals; 8 times

4. 3, 8, and 10 goals; 2 times each

MODULE 10 Challenge 1. Population: all of the school�s teachers;

Sample: every third teacher from an alphabetical list. Within this population, the sample is a random sample only if every teacher on the list has an equal chance of being selected, which would be a function of the number of teachers in the school and its correlation to the 26 letters of the alphabet.

2. Population: all schools in the system; Sample: 5 randomly-selected schools in the system. The schools are selected randomly.

3. Population: all math-science classes in the school; or the ten math-science classes. Sample: The sample is described as 3 math and 3 science teachers. There is no stated randomness in any of these choices. For example, how did the director select the principal, how did the principal select the math-science classes, and why only math-science classes, and not classes of other subject areas?

4. Population: broken into two parts: teachers with 12 or more years of experience and teachers with less than 12 years of experience; Sample: 10 teachers in each of the population categories. Splitting the teacher population decreases the randomness of the sampling process. Also, it is not stated why �12 years� is used to break the population into two parts.

5. Population: all schools in the system; Sample: 4 randomly-selected schools. The sample is described as random.


355

6. Population: all schools in the system; Sample: different numbers of schools in each of three categories. It is not stated why the system’s schools are separated into these categories, even though it is sensible. It is not stated why 10, 5, and5 schools in each category were selected, or if they were randomly selected.

MODULE 11 Analyzing and Comparing Data

LESSON 11-1

Practice and Problem Solving: A/B

1. 7; 25; 25

2. 0.07; 0.15; 0.15 and 0.16 (bi-modal distribution)

3. Both are 3.

4. Plot A has 7 dots; plot B has 9 dots.

5. Plot A’s mode is 21; plot B’s mode is 23 and 24 (bi-modal).

6. Plot A’s median is 21; plot B’s median is 23.

7. Plot A is skewed to the left so its central measures are shifted toward the lower values. Plot B is skewed to the right so its central measures are shifted toward the higher values.


1. The median is 21 pounds, the mode is 22 pounds, and the range is 9 pounds.

2. By both central measures median and mode, each shearing does not produce the 25 pounds he needs.

3. The median is 25 pounds, but the mode is 24 pounds. The range is 9 pounds.

4. The distribution is “almost” bi-modal with 24 and 27 pounds. Because of this and the fact that the median is 25 pounds, the rancher should feel confident that he is very close to the 25 pound target. If he needs more data, he could sample a larger population to see how its measures compare to the 50-animal sample.

Practice and Problem Solving: D

1. 15

2. 15

3. 15

4. Plot Y; Plot X range is 13 11 2. Plot Y range is 42 6 36

5. Plot X; 4 values of 11

6. 11

7. 30

Reteach

1. Answers will vary. The data are not symmetric about the center. The distribution is skewed slightly to the right. The mode is 6, the median is 6, and the range is 10.

Reading Strategies

1. Mean: 6.9; median: 7; mode: 7

2. Mean: 7.3; median: 7; mode: 7

Success for English Learners

1. If there are 12 dots, the median is the average of the 6th and 7th dots’ values.

2. There would be two modes, “1” and “3.”

LESSON 11-2

Practice and Problem Solving: A/B

1.

2. Amy

3. Ed

4. Ed

5. Amy; The range and interquartile range are smaller for Amy than for Ed, so Amy’s test scores are more predictable.

6. Port Eagle

7. Port Eagle

8. Surfside; The interquartile range is smaller for Surfside for than for Port Eagle, so Surfside’s room prices are more predictable.


1.

2. It increases the interquartile range by 1.

3. The range is more affected since the difference is 16.

Science

Social

Studies

grade 7 family resources grade... · text: “stinging tentacles offer hint of oceans’ decline”...

Documents