Experimental Group and Control Group

Match these about variables

• constants

• 2

• variables the scientist can change

• 1

• total number of variables

• things that stay the same

Match these about variables

• variables the scientist can change

• 2

• total number of variables

• things that stay the same

• constants

• 1

Chris 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.

Groups:

(a) Experimental Group

,

(b) Control Group

• Cleaner 1, Cleaner 2, Cleaner 3

• Tap Water

Match

• Control Group

• "I Test, I Change" the variable that the scientist manipulates

• Experimental Group

• Things that have to be the same for both groups so that the experiment is fair.

• Independent Variable

• The group that's being tested; it has the independent variable

• Constants

• The group used to compare; lacks the independent variable

• Variables

• The two things that change in an experiment

Tags

NGSS.MS-ETS1-4

Match

• Experimental Group

• The group that's being tested; it has the independent variable

• Variables

• The two things that change in an experiment

• Dependent Variable

• "I Test, I Change" the variable that the scientist manipulates; happens 1st

• Control Group

• The group used to compare; lacks the independent variable

• Independent Variable

• The resulting variable, the effect, the data, what's being measured

The two groups in a controlled experiment are -

• Control Group

• Experimental Group (Test)

• Independent Variable

• Dependent Variable

• Constant(s)

Shownu and Joohoney conducted an experiment to determine how light affects the growth of flowers. One set of flowers is placed in full sunlight, another in partial sunlight, another in a shaded area, and a final set of flowers is placed in an unlit closet.

Groups:

(a) Experimental Group

,

(b) Control Group

,

(c) Error in experimental design (2)

• It should be the same type of flower

• The flowers would not receive the same airflow

• Flower grown in the unlit closet (lacking light)

• Flowers grown in full sunlight, partial sunlight, and shade

Tags

NGSS.MS-LS1-5

Felix wants to see if different types of fertilizer influence sunflower growth.

Groups:

(a) Experimental Group

,

(b) Control Group

• A sunflower grown without fertilizer

• Sunflowers grown with manure, compost, or commercial fertilizer

Hypothesis: If plants are watered more than normal, then growth will increase.

Groups:

(a) Experimental Group

,

(b) Control Group

• Watering the normal amount

• Watering more than normal

Tags

NGSS.MS-LS1-5

Seungmin wants to know if his new headphones cancel out background noise better than his old headphones, so he decides to try both in the noisiest place he can find.

Groups:

(a) Experimental Group

,

(b) Control Group

• New headphones

• Old headphones

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2