Chapter 1

What should be done with chemical waste after completing an experiment?

• Leave it at your station

• Dispose of it properly

• Dump it in the trash

• Pour it down the sink

What should you do if a piece of equipment breaks?

• Keep it to yourself

• Tell your lab partner

• Notify your instructor

• Clean it up by yourself

When is horseplay, or goofing around, acceptable in a laboratory?

• Always

• Sometimes

• Never

• Depends

A possible explanation to a problem that has not yet been tested. 

• data
• theory
• hypothesis
• fact

This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted. 

• experimental group
• control group
• data
• variables

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

• dependent variable
• independent variable
• data
• control group

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

Observations made during an experiment are called:

• data
• problems
• conclusions
• questions

All living organisms are made up of ____.

• Cells
• Bacteria
• Organs
• Tissue

A plant growing towards a light source is an example of which of the following?

• attracting a mate

• destroying infectious germs

• responding to a stimuli

• obtaining moisture from the air