Scientific Method and Variables

Front

What is the independent variable in an experiment where a scientist investigates the effect of carbon dioxide on plant height by growing plants in several closed containers with varying amounts of carbon dioxide?

Back

the amount of carbon dioxide in each container

Front

The independent variable is the ONE thing you _____.

Back

change

Front

What is the dependent variable when testing the effects of type of exercise on heart rate?

Back

heart rate

Front

How many variables can be tested in a controlled experiment?

Back

one

Front

Is this a testable question? What types of apples grow in Missouri?

Back

No

Front

How does talking to a plant affect a plant's height?

Back

Yes

Front

What is a hypothesis?

Back

A hypothesis is an educated guess.

Front

What step does every scientific experiment begin with?

Back

question/problem

Front

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

Back

To know what is causing the changes

Front

In an experiment to find out how the height from which a ball is dropped affects how high it bounces, what is the dependent variable?

Back

Height that the ball bounces