Independent Variable and Control Group

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

Match these about variables

• total number of variables

• 2

• constants

• things that stay the same

• variables the scientist can change

• 1

A custodian notices some dirty tables and wants to know which cleaner is the best to use. He tests three different cleaners and looks at how well they clean compared to tap water. What is the independent variable?

• type of cleaner

• tap water

An experiment is being done to determine how light affects the growth of small zinnia plants. One plant is placed in full sunlight, the second in a shaded area, the third in an unlit closet. What is the independent variable in the experiment?

• the amount of light

• plant in the closet

Tags

NGSS.MS-LS1-5

Steve wanted to see if different types of fertilizer influence sunflower growth. What is the independent variable?

• type of fertilizer

• sunflower grown without fertilizer

Control

• "I change"

• "I Test"

• Compare

• Stays the same

Tags

NGSS.MS-ETS1-4

Independent Variable, we say (two answer):

• "I change"

• "I Test"

• Compare

• Stays the same

The two groups in a controlled experiment are -

• Control Group

• Experimental Group (Test)

• Independent Variable

• Dependent Variable

• Constant(s)

A custodian notices some dirty tables and wants to know which cleaner is the best to use. He tests three different cleaners and looks at how well they clean compared to tap water. What is the control group?

• type of cleaner

• tap water