6 th grade scientific inquiry lesson 5 1. how do scientists investigate the natural world? what is...

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DOING EXPERIMENTS 6 th grade scientific Inquiry Lesson 5 1

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Page 1: 6 th grade scientific Inquiry Lesson 5 1. How do scientists investigate the natural world?  What is scientific Inquiry?  How are experiments designed

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DOING EXPERIMENT

S6th grade scientific Inquiry

Lesson 5

Page 2: 6 th grade scientific Inquiry Lesson 5 1. How do scientists investigate the natural world?  What is scientific Inquiry?  How are experiments designed

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ESSENTIAL QUESTIONHow do scientists investigate the natural

world?

What is scientific Inquiry?

How are experiments designed and conducted?

What are some other types of scientific investigations?

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WHAT IS SCIENTIFIC INQUIRY? Scientific Inquiry refers to the

diverse ways in which scientists study the natural world and propose explanations based on the evidence they gather.

Rachel Carson-water toxins

Rosland Franklin-DNA x-rays

Jane Godall –animal observations

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PAGE 35PROPOSING A QUESTION

Questions are an essential part of science. But scientific questions are limited to the natural world.

The objects may be either living or nonliving things.

What makes a question scientific is that it can be answered by observations, or evidence.

“What is the relationship between . . .” “What factors cause . . .” “What is the effect of . . .”

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Page 7: 6 th grade scientific Inquiry Lesson 5 1. How do scientists investigate the natural world?  What is scientific Inquiry?  How are experiments designed

PAGE 36DEVELOPING A HYPOTHESIS HYPOTHESIS – The Expected Results. The

investigator poses the question in such a way that it can be tested.Alternative hypothesis -Abbreviated Ha.

Null hypothesis – Opposite of the Expected Results. The opposite of the Alternative hypothesis. Stated in terms of " expected results not occurring”. Abbreviated Hb.

Try to word each of your hypotheses in the form of an If... then ... statement.

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PAGE 36 What are the two hypotheses that might answer this question: Why does it take the school bus longer to get to school on a Monday compared to a Friday?

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PAGE 37 VARIABLES A VARIABLE IS A FACTOR THAT CAN CHANGE IN AN EXPERIMENT

Manipulated

Response

IndependentIs purposely

changed to test the

hypothesis.

Dependent

Changes in response to

the independent variable

Controlled

Consistent

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PAGE 37 APPLY IT!

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PAGE 38SETTING UP A CONTROLLED EXPERIMENT

An experimental plan is not complete unless the experimenter controls all other variables.

Controlling variables means keeping all conditions the same except for the manipulated variable.

Most common types of variables: time, temperature, length, width, height, mass, volume, number, and kinds of substances being used in the experiment.

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PAGE 38 SETTING UP A CONTROLLED EXPERIMENT

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PAGE 39 COLLECTING & INTERPRETING DATA

Organize the data into a table or arrange the data in a specific order, such as largest to smallest.

Make a graph of the data. Look for trends or patterns in the

data or graph.

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PAGE 40 DRAWING CONCLUSIONS Refer to the hypothesis for your

experiment. Review the observations in your

experiment. Analyze the data. Determine whether your data support

your hypothesis or suggest that it is false.

Consider whether you might plan other experiments to support your conclusion or compare your work with that done by other researchers.

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PAGE 41 COMMUNICATING

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PAGE 42 OBSERVATIONAL RESEARCH OPINION-BASED RESEARCH

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PAGE 43

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HOMEWORK Complete Lesson 5 Assess Your Understanding pg page 36,

41, 43. Review and Assessment Page 45-46 #1-

19 Florida Benchmarks Review page 47 #1-7

1st chance to hand in Chapter 1 Wednesday2nd/last chance to hand in Chapter 1 Thursday

Vocabulary Study Sheet 9/5 Vocabulary Quiz on Friday Back to School Night 9/23

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HOW TO MAKE A NUTELLA

SANDWICH!

An exercise in WRITING PROCEEDURES

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LET’S DO AN EXPERIMENT!Which cup of seeds will grow the fastest? The one with less or more competition?

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BACKGROUND INFORMATIONPlants make their own food using photosynthesis, so they do not compete for food. Plants do compete for: light, water, space and minerals

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PROBLEM STATEMENT Which cup of seeds will grow the fastest? The one with less or more competition?

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CONTROLS

•Same cup size•Same type of seeds•Same amount of soil•Same type of soil•Same amount of water•Same amount of light

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MANIPULATED / INDEPENDENT VARIABLE

The number of seeds competing in each cup

Cup #2Per. __Group __

Cup #3Per. __Group __

Cup #1Per. __Group __

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DEPENDENT VARIABLE Speed of seedling growth

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HYPOTHESIS If ……….. then……… If ……….. then………

Alternative hypothesis -, and actually the statement of interest. Abbreviated Ha.

Null hypothesis - The opposite of the Alternative. Stated in terms of " expected results not occurring” . Abbreviated Hb.

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MATERIALS LIST 3 Cups Soil 12 Lima bean seeds Water/ pipette Light source Marker Metric Ruler

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PROCEDURE STEPS Label 3 cups- cup #, period, group name Equal amount of soil into each cup 2 seeds in cup #1 4 seeds in cup #2 6 seeds in cup #3 Equal amount of water in each cup Equal amount of light exposure Record seedling growth over a 10-14

day period by measuring tallest seedling in each cup.

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RESULTS Data table Line Graph with 3 lines

Date Cup#1 Cup #2 Cup#3

Seedling Growth in cm

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HOMEWORK 2nd Chance Chapter 1-Thursday Last Chance to hand in Chapter 1 Friday Vocabulary Study Sheet 9/5 Vocabulary Quiz on Friday Back to School Night 9/23

Make-Up Quiz Monday Morning

before school or during homeroom

Page 34: 6 th grade scientific Inquiry Lesson 5 1. How do scientists investigate the natural world?  What is scientific Inquiry?  How are experiments designed

Line Graphing Directions

1. Use the data from the table to choose an appropriate scale. All scales usually start at 0

2. X-axis and Y-axis. Line graphs are used when examining relationships between two types of information.

3. The dependent variable is plotted on the Y-axis and usually measures quantity (percentage, length, liters, etc.).

4. The independent variable is plotted on the X-axis and usually measures time.

5. Locate the points on the graph. Plotting data points “RUN & JUMP”

6. Connect the points with line segments.7. Include a title and labels on the graph.

Page 35: 6 th grade scientific Inquiry Lesson 5 1. How do scientists investigate the natural world?  What is scientific Inquiry?  How are experiments designed

LET’S PRACTICE

Y

X

TIME

MEA

SU

RIN

G

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LAB ANALYSIS – CONCLUSIONCOMPETITION IN PLANTS (AT THE END)

Lab Questions:

1) Which plants grew the fastest? Did this support or disprove your hypothesis? Explain.

2) What were some problems we had over the entire course of this lab? How did you resolve them?

3) How could we improve this lab procedure if we repeated the experiment?

4) What is a new question this lab makes you think of? How would you test it?

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HOMEWORK Last Chance to hand in Chapter 1 Friday Vocabulary Study Sheet 9/5 Vocabulary Quiz on Friday Back to School Night 9/23

Make-Up Quiz Monday Morning

before school or during homeroom