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Variables, Controls & Constants
Test Description: Pick out the variables, controls and constants from these short scenarios.
Instructions: Answer all questions to get your test result.
1) What is the independent variable in this question: Does the amount of fertilizer make a plant grow taller?
A
type of fertilizer
B
amount of fertilizer
C
height of plant
D
type of plant
2) What is the dependent variable in this problem: what brand of gum will make the biggest bubble?
A
flavor of gum
B
person chewing
C
size of bubble
D
brand of gum
3) Which is the control: Sue watered plant A with water; plant B with vinegar, and plant C with ammonia to find out how acids and bases affected plant growth.
A
Water - neutral
B
Type of plant used
C
Ammonia - base
D
Vinegar - acid
4) How does the shape of an ice cube affect how soon it melts? What is the dependent variable?
A
Temperature of the room
B
Size of the ice cube
C
Shape of the ice cube
D
Melting rate of the ice cubes
5) How does the shape of an ice cube affect how soon it melts? What is the independent variable?
A
Temperature of the room
B
Shape of the ice cube
C
Melting rate of the ice cubes
D
Size of the ice cube
6) Which is the constant: Sue watered plant A with water; plant B with vinegar, and plant C with ammonia to find out how acids and bases affected plant growth.
A
Type of plant
B
Water - neutral
C
Ammonia - Base
D
Vinegar - acid
7) What is the dependent variable in this question: Does the amount of fertilizer make a plant grow taller?
A
type of plant
B
amount of fertilizer
C
height of plant
D
type of fertilizer
8) What is a constant you would need to have to make this a valid experiment: Does the amount of fertilizer make a plant grow taller?
A
type of plant
B
height of plant
C
growth rate of plant
D
amount of fertilizer
9) What is the independent variable in this problem: what brand of gum will make the biggest bubble?
A
person chewing gum
B
flavor of gum
C
brand of gum
D
size of bubble
10) If I throw food at lunch, will I get lunch detention? What is the independent variable?
A
people I sit with at lunch
B
throwing food
C
type of food I have to throw
D
lunch detention
*select an answer for all questions
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