7th Science Bellwork2014-2015

10/10/14

• Which paragraph correctly describes how species of fish adapt to changes in their environment?• A- In every generation, fish are born with

slightly different traits. Some traits will help the fish survive the changing environment. Fish with these helpful traits survive and pass on those traits.

• B- Not all fish that are born can survive in the changing environment. In their lifetimes, some of these fish can change to better fit the environment. These fish pass on the new traits to their offspring.

Date: 8/25/14

Seasons change because:

A- Earth’s orbit is not round

B- Earth’s axis is tilted

C- Earth’s orbit changes speed

D- Earth’s revolution around it’s axis slows down

Answer: B

Date: 8/26/14

If an apple tree did not make any flowers, what would happen?

A-It would make seeds, but not apples

B- It would not make apples or seeds

C- It would make smaller apples than usual

D- It would make more apples than usual

Answer: B

Vocab Part 2

• Within the boxes you made yesterday, you must now add two more things• The pronunciation of the word• For example atmosphere= at-muss-fear

• A drawing of the word• For example, you could show atmosphere by

drawing the earth with some air around it

Date: 8/27/14

Which of these add gases to Earth’s atmosphere?

A- cars

B- plants

C- people

D- all of the above

Answer: D

Date: 8/28/14

Different cells do different jobs. What is on job a cell can’t do?

A- move

B- break down food for energy

C- produce chemicals

D- inhale

Answer: D

Date:8/29/14

Tree roots can push through rock and break it. What is one other way that rock wears away? Answer in complete sentences.

Answers: Water flowing, wind blowing, glaciers, ice wedging, abrasion, exfoliation, pressure release

Date: 9/2/14

If the size of the Sun were represented by a soccer ball, which would best represent Earth?

A- a basketball

B- a bowling ball

C- a giant pumpkin

D- a marble

Answer- D

Date: 9/5/14If you were creating an electrical circuit and ran out of wire, which of these materials would make a good substitute?

A- yarn

B- Plastic knitting needle

C- licorice strings

D- tin foil

Bonus: Think about your choice above. What property of this material made it a good choice?

Answer: D, because tin foil is a metal and metals are conductors of electricity

Date: 9/8/14

Which of the following makes its own food using energy from the sun?

A- green algae

B- trees

C- sunflowers

D- all of the above

Bonus: What do you call the process that plants use to make their own food?

Answer: D, the process is called photosynthesis.

Date: 9/9/14

By writing in complete sentences, name the energy source that starts as heat, travels as light, and provides the energy for all of Earth’s food chains.

When you have finished, use this time to study for your test.

Answer: The energy source is the Sun.

Date: 9/10/14

Your teacher hands you a mystery solid. She asks you to describe its properties. What are two things you could talk about? (Remember, it is NEVER safe to taste an unknown substance!)

Use complete sentences.

Answer: You could talk about: color, shape, hardness, mass, volume, density, texture, smell.

Date: 9/11/14Objective: Goal Setting

Name three ways plants can help animals. Name one way that animals can help plants. Use complete sentences.

Answer: Plants can provide food, oxygen, shelter, shade, protection, etc. Animals can spread seeds, put nutrients in soil, eat competing plants, etc.

Date: 9/12/14

What do you think will happen to a forest ecosystem after a forest fire?

A- Nothing will grow.

B- Only moss will grow.

C- Trees will grow first, then smaller plants.

D- Small plants will grow first, then trees.

Answer: D

Date: 9/15/14

• Fill in the blanks• __________ _____________ is the force of air

molecules pushing on an area.• Air pressure increases as air density _________.• Therefore, air pressure decreases as altitude

_________.• Air moves from areas of ____ pressure to ____

pressure.• A ___________ is any instrument that measures

air pressure.

Date: 9/16/14

Water is a solvent. This property of water results in which of the following during the water cycle?

A- Rain has bits of rock in it

B- Hail is hard

C- Rivers stop running

D- Minerals are washed to the sea

Answer: D

Date: 9/17/14

Which of the following is too small to be seen with an ordinary microscope?

A- an atom

B- a cell

C- a neuron

D- muscle tissue

Answer: A

Date:

Plants can have many different sorts of roots. What are two functions that nearly all roots share? Use complete sentences.

Answer: Most roots absorb water and nutrients and hold a plant in place.

Date: 9/18/14

In which state(s) does water have a definite mass, volume, and shape?

Answer: Water has all of those qualities while in the solid state.

Date: 9/22/14

A scientist heats a sample of metal to 640 degrees Celsius, and the metal turns to liquid. What could he conclude?

A- 640 is the metal’s boiling point.

B- 640 is the metal’s melting point.

C- At 640 the metal disintegrates.

D- The metal has become a new compound.

Bonus: If the scientist continues to heat the metal, what will happen?

Answer: B; The metal will eventually boil and become a gas.

Date: 9/23/14

Which of these can lessen the erosion of a hillside?

A-trees

B-hikers

C- streams

D- power lines

Bonus: Name one thing that can trigger a landslide.

Answer: A; earthquake, powerful storm, volcanic eruption

Date: 9/24/14

A planet closer to the Sun than Earth is likely to be which of the following?

A- full of living things

B- made of gas

C- hotter than Earth

D- all of the above

Answer: C

Date: 9/26/14

Which of these is a chemical change?

A- ice cream melting

B- your breath forming steam in winter

C- a plant using sunlight to make food

D- sunlight speeding up the evaporation of a bowl of water

Answer: C

Date: 9/29/14Which event could cause a species to go extinct?

A- a fallen meteorite covering much of Earth in dust

B- a change in climate

C- a loss of habitat

D- all of the above

Bonus: Explain how your answer could lead to extinction. Use complete sentences.

Answer: D; Dust would cause the Earth’s temperature to drop. Climate change will affect animals that are not adapted to that climate. A loss of habitat means the animal has no protection.

Date: 9/30/14

Which describes what soil is made of?

A- dead plants and animals

B- broken rocks

C- minerals

D- all of these

Bonus: Describe a way in which soil is made.

Answer: D; Rocks wear away, dead animals decompose, etc.

Date: 10/1/14 Which thermometer shows the ideal daytime temperature for a plant called gardenia?

Time of Day Ideal temperature for gardenias (°F)

Daytime 65-70

Nightime 60-62

Answer: B

A CB

Date: 10/2/14If you want to explain what Earth’s moon is made of, which of these would you say it is most like?

A-Earth

B-Jupiter

C-the sun

D- a comet

Bonus: Choose one planet in the solar system. Describe one way that our moon is like that planet, and one way that it is different.

Answer: A; varies

Date: 10/3/14

Imagine you’re walking down the street and you see a tiger heading your way. Immediately, you body gets ready to react and run away. Name a change that will happen in one of your organ systems that could help you.

Answer: Heart beats faster/breathe harder (get more oxygen and blood to your muscles); muscles tense to help you run; etc.

10/7/14

• On yesterday, put “No Bellwork”

• What is the lowest number of cells a living organism can have?A- ½B- 7C- 1D- 566,892

10/8/14

• Describe a continental polar air mass.

• Describe a maritime tropical air mass.

• What kind of weather occurs in a low pressure system?

10/9/14

• Which statement is true for both plant and animal cells?• A- cells break down sugar for energy• B- cells make food from sunlight• C- cells use energy from food that was

digested in the stomach.• D- cells carry information through a

nervous system.

10/13/14• Complete the chart to compare Earth to

Jupiter.Jupiter Earth

Time it takes to orbit the Sun

4,333 days _____________ days

Number of Moons 63 _____________ moons

Length of Day 10 hours _____________ hours

Size (diameter) 143,000 km Pick oneA: 210,000 kmB: 12,800 kmC: 1,280 km

10/14/14

• After digging 30 meters underground, scientists find a rock that looks like this. Which would be a logical conclusion?• A- It is probably an odd shaped

rock• B- It is the imprint of an animal

that died very recently.• C- It is the imprint of an animal

that died very long ago.• D- It is a recent carving meant to

look like an animal.

10/15/14

• You are designing an experiment to find out which type of frog can jump farther. Which is the dependent variable in this experiment?• A- jumping distance• B- type of frog• C- color of frog•D- texture of the jumping surface

10/16/14

• I mix together two clear liquids. When the two liquids mix, they turn blue and create bubbles. You just witnessed a• A- transfer of energy• B- physical reaction• C- chemical reaction•D- force

10/17/14

• On a hike through the forest, you see rocks, soil, trees, smaller plants and flowers, birds, worms insects, and mice. Which of these are abiotic factors, and which of these are biotic?

10/20/14

• It is a short week. On Thursday and Friday, write the date and “No School”

• Your objective for all of this week is “Review for Unit Test”

• Your response for today is to answer this question: What areas of this unit are you still confused about, or what questions do you still have about this unit?

• You cannot put “Nothing” or “IDK” or you will receive no credit.

10/21/14

•What is the difference between a physical and chemical change?

10/28/14

• Objective: I will be able to identify different types of energy.

• Response: What types of energy are used while driving a car?

10/30/14

• Objective:

• Response: Write “Field Trip” on Wednesday.

• Today, answer these questions:• What was your favorite part of the field trip?• What was your least favorite part?• What would make it better?

10/31/14

• Objective: I will be able to identify different types of energy transformations

• Response: Write down your best Halloween joke.

11/3/14

• Objective: I will be able to describe the order of celestial bodies in space.

• Response: What are the different parts of the universe?

11/4/14

• What is a molecule?• A- a combination of compounds• B- a combination of atoms• C- the building blocks of an atom•D- the building blocks of a neutron

11/5/14

• Objective: I will be able to identify the cause of the seasons.

• Response: What is the difference between rotation and revolution?

11/6/14

• Objective: I will be able to describe the composition of the moon.

• Response: Tell me what you know about the moon.

11/7/14

• Objective: I will be able to describe the composition of the moon.

• Response: What is the difference between the light and dark areas on the moon?

11/12/14

• Objective: I will be able to identify the phases of the moon.

• Response: Does the moon rotate? Revolve?

11/13/14

• Objective: I will be able to identify the phases of the moon

• Response: What are the two types of eclipses?

11/14/14

• Objective: I will be able to identify the eclipses and tides.

• Response: How many tides are there in a day?