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Independent, dependent and control variables

5th grade (Year 6 in England) · 16 questions · Common Core: NGSS.SEP 3, NGSS.MS-PS2-2 · England: KS2 Y5–Y6 Working scientifically, KS3 Working scientifically

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Score/ 16

1
Question 1
Investigation: Does the size of a parachute affect how long it takes to fall? Which is a control variable (one you keep the same)?
- A. time for one swing
- B. mass hanging from it
- C. size of the parachute
- D. time to fall
2
Question 2
Investigation: Does the number of cells (batteries) affect how bright a bulb is? Which is the independent variable (the one you change)?
- A. size of the parachute
- B. brightness of the bulb
- C. number of cells
- D. type of bulb
3
Question 3
Investigation: How does the amount of light affect the growth of cress? Which is the dependent variable (the one you measure)?
- A. amount of light
- B. height of the cress
- C. heart rate (beats per minute)
- D. type of soil
4
Question 4
Investigation: How does the mass of a pendulum bob affect the time of one swing? Which is a control variable (one you keep the same)?
- A. time for one swing
- B. mass of the bob
- C. length of the string
- D. distance the car travels
5
Question 5
Investigation: How does exercise affect heart rate? Which is the independent variable (the one you change)?
- A. minutes of exercise
- B. type of exercise
- C. water temperature
- D. heart rate (beats per minute)
6
Question 6
Investigation: How does the height of a ramp affect how far a toy car travels? Which is the dependent variable (the one you measure)?
- A. distance the car travels
- B. time to fall
- C. the same floor surface
- D. height of the ramp
7
Question 7
Investigation: Does the temperature of water affect how quickly sugar dissolves? Which is a control variable (one you keep the same)?
- A. water temperature
- B. mass of sugar
- C. time for the sugar to dissolve
- D. brightness of the bulb
8
Question 8
Investigation: How does the amount of light affect the growth of cress? Which is the independent variable (the one you change)?
- A. amount of light
- B. mass of the bob
- C. amount of water
- D. height of the cress
9
Question 9
Investigation: How does the height of a ramp affect how far a toy car travels? Which is the dependent variable (the one you measure)?
- A. time to fall
- B. distance the car travels
- C. height of the ramp
- D. the same car
10
Question 10
Investigation: How does the amount of light affect the growth of cress? Which is a control variable (one you keep the same)?
- A. type of soil
- B. distance the car travels
- C. height of the cress
- D. amount of light
11
Question 11
Investigation: How does exercise affect heart rate? Which is the independent variable (the one you change)?
- A. minutes of exercise
- B. heart rate (beats per minute)
- C. type of exercise
- D. number of cells
12
Question 12
Investigation: Does the surface area of a puddle affect how fast it evaporates? Which is the dependent variable (the one you measure)?
- A. volume of water
- B. time for the water to evaporate
- C. distance the car travels
- D. surface area of the water
13
Question 13
Investigation: Does the size of a parachute affect how long it takes to fall? Which is a control variable (one you keep the same)?
- A. time to fall
- B. time for the sugar to dissolve
- C. drop height
- D. size of the parachute
14
Question 14
Investigation: Does the temperature of water affect how quickly sugar dissolves? Which is the independent variable (the one you change)?
- A. time for the sugar to dissolve
- B. water temperature
- C. mass of the bob
- D. volume of water
15
Question 15
Investigation: How does exercise affect heart rate? Which is the dependent variable (the one you measure)?
- A. minutes of exercise
- B. heart rate (beats per minute)
- C. the same person
- D. time for the sugar to dissolve
16
Question 16
Investigation: How does the mass of a pendulum bob affect the time of one swing? Which is a control variable (one you keep the same)?
- A. mass of the bob
- B. starting angle
- C. time for one swing
- D. distance the car travels

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