Experimental Group and Control Group

Match these about variables

• total number of variables

• 1

• constants

• things that stay the same

• variables the scientist can change

• 2

Match these about variables

• constants

• 2

• variables the scientist can change

• 1

• total number of variables

• things that stay the same

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

• Independent Variable

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

• Experimental Group

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

• Constants

• The group used to compare; lacks the independent variable

• Control Group

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

• Variables

• The two things that change in an experiment

Tags

NGSS.MS-ETS1-4

Match

• Control Group

• The two things that change in an experiment

• Variables

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

• Dependent Variable

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

• Independent Variable

• The group used to compare; lacks the independent variable

• Experimental Group

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

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)

• The flowers would not receive the same airflow

• It should be the same type of flower

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

• Flower grown in the unlit closet (lacking light)

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 more than normal

• Watering the normal amount

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

• Old headphones

• New headphones

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2