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Plant growth experiments

2nd grade (Year 3 in England) · 16 questions · Common Core: NGSS.2-LS2-1, NGSS.SEP 4 · England: KS1 Y2 Plants, KS1 Working scientifically

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  1. Question 1

    Why is it better to grow five plants in each group instead of just one?

    • A. It makes the chart more colourful.
    • B. More plants make the test faster.
    • C. Plants are lonely on their own.
    • D. One plant might be unusual; more plants give more reliable results.

  2. Question 2

    Three bean plants were grown for two weeks in different conditions. The chart shows their heights in cm. Which plant grew least?

    Plant height after 2 weeks (cm)02468101214161817light and water9water, no light3light, no water
    • A. light and water
    • B. water, no light
    • C. light, no water

  3. Question 3

    A bean plant was 4 cm tall on Monday. Two weeks later it was 12 cm tall. How many centimetres did it grow?

    Answercm

  4. Question 4

    Ana wants to test whether plants need water. She gives one plant water and one none. What else must she do?

    • A. Use a different type of plant for each.
    • B. Put the watered plant in a dark cupboard.
    • C. Give the dry plant extra sunlight to make up for it.
    • D. Keep the light, soil, pot and type of plant the same.

  5. Question 5

    Three bean plants were grown for two weeks in different conditions. The chart shows their heights in cm. Which plant grew best?

    Plant height after 2 weeks (cm)024681012141615light and water11water, no light3light, no water
    • A. light and water
    • B. water, no light
    • C. light, no water

  6. Question 6

    A sunflower seedling was 3 cm tall on Monday. Two weeks later it was 15 cm tall. How many centimetres did it grow?

    Answercm

  7. Question 7

    Which is the best way to measure how much a plant has grown?

    • A. Count its roots every day by digging it up.
    • B. Measure its height with a ruler at the start and the end.
    • C. Guess by looking at it.
    • D. Weigh the pot only once.

  8. Question 8

    Three bean plants were grown for two weeks in different conditions. The chart shows their heights in cm. Which plant grew least?

    Plant height after 2 weeks (cm)0246810121416182019light and water11water, no light2light, no water
    • A. light and water
    • B. water, no light
    • C. light, no water

  9. Question 9

    A bean plant was 4 cm tall on Monday. Two weeks later it was 17 cm tall. How many centimetres did it grow?

    Answercm

  10. Question 10

    Ana wants to test whether plants need water. She gives one plant water and one none. What else must she do?

    • A. Give the dry plant extra sunlight to make up for it.
    • B. Keep the light, soil, pot and type of plant the same.
    • C. Use a different type of plant for each.
    • D. Put the watered plant in a dark cupboard.

  11. Question 11

    Three bean plants were grown for two weeks in different conditions. The chart shows their heights in cm. Which plant grew least?

    Plant height after 2 weeks (cm)0246810121416182020light and water7water, no light3light, no water
    • A. light and water
    • B. water, no light
    • C. light, no water

  12. Question 12

    A sunflower seedling was 3 cm tall on Monday. Two weeks later it was 8 cm tall. How many centimetres did it grow?

    Answercm

  13. Question 13

    Which is the best way to measure how much a plant has grown?

    • A. Guess by looking at it.
    • B. Measure its height with a ruler at the start and the end.
    • C. Weigh the pot only once.
    • D. Count its roots every day by digging it up.

  14. Question 14

    Three bean plants were grown for two weeks in different conditions. The chart shows their heights in cm. Which plant grew best?

    Plant height after 2 weeks (cm)0246810121416182019light and water12water, no light2light, no water
    • A. light and water
    • B. water, no light
    • C. light, no water

  15. Question 15

    A tomato seedling was 6 cm tall on Monday. Two weeks later it was 18 cm tall. How many centimetres did it grow?

    Answercm

  16. Question 16

    Which is the best way to measure how much a plant has grown?

    • A. Weigh the pot only once.
    • B. Guess by looking at it.
    • C. Count its roots every day by digging it up.
    • D. Measure its height with a ruler at the start and the end.

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Answer key: Plant growth experiments

  1. 1. D. One plant might be unusual; more plants give more reliable results.

  2. 2. C. light, no water

  3. 3. 8 cm

  4. 4. D. Keep the light, soil, pot and type of plant the same.

  5. 5. A. light and water

  6. 6. 12 cm

  7. 7. B. Measure its height with a ruler at the start and the end.

  8. 8. C. light, no water

  9. 9. 13 cm

  10. 10. B. Keep the light, soil, pot and type of plant the same.

  11. 11. C. light, no water

  12. 12. 5 cm

  13. 13. B. Measure its height with a ruler at the start and the end.

  14. 14. A. light and water

  15. 15. 12 cm

  16. 16. D. Measure its height with a ruler at the start and the end.