Experimental Design

Front

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

Back

control group

Front

What is the independent variable in the custodian's test comparing three cleaners and tap water?

Back

type of cleaner

Front

What is the independent variable in the experiment with zinnia plants placed in different lighting conditions?

Back

the amount of light

Front

What is the independent variable in Steve's experiment on sunflower growth with different fertilizers?

Back

type of fertilizer

Front

What is the control group when testing three different cleaners compared to tap water?

Back

tap water

Front

What is the control group in an experiment where one plant is placed in full sunlight, the second in a shaded area, and the third in an unlit closet?

Back

the plant in the closet

Front

What is the control group in Maddie's experiment on sunflower growth with different fertilizers?

Back

sunflower grown without fertilizer

Front

What is the independent variable in the hypothesis: "If plants are watered more than normal, then growth height will increase"?

Back

the amount of water

Front

Identify the independent variable in Mrs. Barton's experiment on how different types of music affect students' pulse rates.

Back

types of music

Front

What constant should be considered when testing how different types of music affect students' pulse rates?

Back

amount of time the music was played