Forming a Hypothesis

FORMING A HYPOTHESIS

Tuesday, Aug. 28th

Purposes: • Content: Develop personal responsibility and make

hypotheses based on observations of the natural world.• • Language: Use an “if . . . then” sentence frame to create

hypotheses.

• PWG Outcome: help your group form hypotheses for each inquiry.

• Day 7 –Discuss with your partner what makes for good communication between students.

First 20 days

Hypothesis Structure

IF Then

How to make a hypothesis statement:• Hypothesis statements are ALWAYS written as "If ...Then"

statements.

Example of a hypothesis• If I stay out in the sun for 3 hours then I will get a sunburn.

Changing my thoughts into hypotheses

• I’m thinking: The higher the temperature of the water, the faster the egg will cook.

• I write as a hypothesis: If I raise the temperature of the water then, the egg will cook faster

• Or. . . If temperatures of water are raised, then the eggs will cook faster.

Changing my thoughts into hypotheses

• I’m thinking: Lemon trees receiving the most water • produce the largest lemons.

• I write as a hypothesis: If I increase the amount of water given to lemon trees, the size of the lemons produced will increase.

How to disagree agreeably• ..\My Flipcharts\My Flipcharts\Scientific Method and natur

e of science\Disagreeing respectfully.flipchart

You try :

1. With the group: If I do this;______________ then ________________. (will happen)

2. With a partner: If I ___________________ then _________________.

3. By yourself: If ______________________ then ________________.

Example of a hypothesis• If I stay out in the sun for 3 hours then I will get a sunburn.

Determining Dependent and Independent variables

Independent Variable - Variable in an experiment that is changed or manipulated.

I.V. - The amount of time spent in the sun

Dependent Variable - The variable in an experiment that responds to the change and is measured.

D.V. - Getting a sunburn

How could we change our hypothesis to provide for a more scientific experiment?• Measure using quantitative data versus qualitative data.

Vocabulary:• Quantitative Data: uses numbers and measurements• Qualitative Data: uses 5 senses to observe

Assignment• This week we will be creating an experiment from

beginning to end. You will be following the steps of scientific inquiry (the scientific method).

• You must think of something you would like to test.

• Homework: come up with a question, observe or research something, and come up with a hypothesis statement.