Scientific Method & Variables

What is a hypothesis?

• A hypothesis is the right answer to an experiment.

• A hypothesis is the wrong answer to an experiment.

• A hypothesis is an educated guess.

• A hypothesis is a question.

Tags

NGSS.HS-PS1-2

A hypothesis can be wrong in an experiment.

• true

• false

• only sometimes

Tags

NGSS.MS-LS1-5

The independent variable is the ONE thing you _____.

• change
• keep the same
• experiment with
• investigate

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

The variable that you measure is the -

• IV
• DV
• Constant
• Repeated Trial

Tags

NGSS.MS-PS3-4

The variables in an experiment that stay the same are the -

• Independent Variable (IV)

• Dependent Variable (DV)

• Control Variable (CV)

In a well designed experiment, you should change how many variables?

• only one
• no more than two
• none at all
• as many as are needed

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

A student wants to test the effects of type of exercise on heart rate.  What is the dependent variable?

• heart rate
• type of exercise
• amount of exercise
• time of day exercise occurs

Why do scientists use the scientific method?

• To make sure they get credit for their discoveries.

• To make sure their results are valid and can be performed by other scientists.

• So that other scientist don't get mad at them

• Because their 6th grade science teacher told them to.

Tags

NGSS.MS-LS1-5

NGSS.MS-PS1-2

True or False: Your hypothesis can never be wrong.

• True
• False

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid: water, apple juice, or milk. What variables should be kept constant/controlled?

• type of plant, flower pot, soil, and amount of sunlight

• water, apple juice, milk

• only the amount of sunlight

• type of plant only