Scientific Variables

Penelope wanted to see if the temperature of the oven made cookies softer or harder. What is the independent variable.

• Hardness of cookie

• Type of oven

• Temperature of oven

Marcos wants to know: Does the type of gasoline put in a car effect how fast the car can drive? What is the dependent variable?

• Type of gasoline

• which car the gas is put into

• how fast the car can drive

• how much gas is put into the car

How many variables can be tested in a controlled experiment?

• one

• two

• three

• as many as possible

Tags

NGSS.MS-PS2-2

If I study for my scientific method test, then I will have a better test score. What is the dependent variable?

• Scientific Method

• Studying

• Independent variable

• Test score

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

• Independent Variable

• Dependent Variable

• Constants

• Control

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

What are the constant variables?

• what we are changing or testing

• what we are observing or measuring

• what we keep the same to make the experiment fair

Tags

NGSS.MS-PS3-4

Why do we want to test one variable at a time?

• Because it is hard to setup a data table with more

• To know what is causing the changes

• It is what has always been done

• No one really knows

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable

• independent variable

• data

• control group

Tags

NGSS.MS-PS2-2

Which variable depends on what is done at the beginning of an experiment?

• Dependent

• Independent

• Control

• Following