Making Hypothesis

Making Hypothesis

let's review previous lesson

Testable and Non-testable Question

Differences??

Multiple Choice

True or false: A testable question compares how one thing affects another thing.

• True

• False

Multiple Choice

Does the type of shoes affect the running speed? Which is the correct testable question?

• If the subject wears boots, then the subject will jump the fastest.

• If the subject wears heels, then the subject will run the slowest.

• The subject wears Nike, then the subject will run the fastest.

• If I wear Nike, then I will run the slowest.

Next is

Observation vs Inference

still remember?

Multiple Choice

A student recorded how many commercials she saw in one week. Her results are recorded above. What can you you infer?

• The tv shows lasted longer on Monday.

• She watched more tv on Monday.

• The tv shows didn't last as long as usual on Monday.

• She watched less tv on Monday.

Multiple Choice

Which of the following is an observation about this picture?

• The boy has fallen off his bike.
• The boy is in a lot of pain.
• The boy has injuries to his knees
• The boy learned his lesson about wheelies

Independent - Dependent - Controlled Variables

Multiple Choice

Research question: does the distance a person kicks a soccer ball effect how well they will do on their math test. What is the dependent variable?

• How far they kick the soccer ball

• who the person is

• how well they do on the math test

• Type of soccer ball.

Multiple Choice

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent

• Independent

• Control

• Compound

Learning objective

After this lesson, you should be able to build a proper hypothesis for a scientific experiment

What is a hypothesis

How do we write a hypothesis

What is a Hypothesis?

• A testable answer to a scientific questions.

• Scientist have a question on a specific topic and they research.

• Hypothesis is also called "an educated guess".

• It's an If...Then....Because statement

When Writing A Hypothesis

• First, write If... followed with the independent variable

• Next, write Then... followed with the dependent variable

• Because....why you think that

Testable Question

What effect does studying with music have on student test scores?

Independent Variable

Studying with music

Dependent Variable

Student test scores

Hypothesis

If students study with music, then their scores will increase because music helps them to relax

Another example

Testable Question

How does the amount of leaves on a tree affect how many birds will build nests in it?

Independent Variable - amount of leaves on a tree

Dependent Variable - amount of bird build nests in the tree

Hypothesis

Hypothesis - IF there are a lot of leaves on the tree, THEN there will be more birds build nests in it, BECAUSE there is more shade to protect the birds.

Multiple Choice

Choose the correct hypothesis for "How will exercising affect your health?"

• IF you have better health, THEN you will exercise.

• IF you exercise, THEN you will have better health.

• Exercising means you're healthy.

Multiple Choice

Choose the correct hypothesis for "What effect does studying have on your test grade?"

• IF I study for hours, THEN my test grade will be better.

• IF I have a good test grade, THEN I will study.

• Good grades are from studying.

Multiple Choice

When writing you hypothesis, what information follows IF?

• dependent variable

• how you know it will happen

• independent variable

• anything