Unit 0: Experimental Design

A series of steps used by scientists to solve a problem or answer a question. 

• scientific method
• recipe
• data collection
• metric system

In a "controlled" experiment, how many variables should you change at a time?

• 4
• 3
• 6
• 1

What is an independent variable?

• Variable that is changed
• Variable that is not changed
• Variable being measured

What is the dependent variable?

• Variable that is changed
• Variable being measured

True or False: A hypothesis must be stated in a way that is testable.

• True
• False

A sample that is treated exactly like the other experimental groups except that the variable is not applied to it is a(n) ____.

• observation

• control

• variable

• hypothesis

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

• IV
• DV
• Constants

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

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

• Yes
• No 

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.