Science 5 · Unit 1: Life cycles of flowering plants · Cambridge Primary Science Stage 5

Questions

1. 1. What is germination?

   • when pollen reaches the stigma
   • when seeds are spread
   • when a flower opens
   • when a seed starts to grow
   Check

2. 2. What must a seed do before it can start to grow?

   • make flowers
   • get light
   • lose its food store
   • absorb water
   Check

3. 3. Where does a germinating seed get its energy?

   • from the air
   • from the soil
   • from sunlight
   • from its food store
   Check

4. 4. Which part of a new bean plant grows first?

   • the root
   • the leaves
   • the flower
   • the shoot
   Check

5. 5. Why does the first root grow downwards?

   • to make flowers
   • to find light
   • to find insects
   • to find water and hold the plant in the soil
   Check

6. 6. Why does the first shoot grow upwards?

   • to find water
   • to find soil
   • to hide from animals
   • to reach the light
   Check

7. 7. Why does the seed shrivel and become small after germination?

   • It turned into a root.
   • It dried out in the sun.
   • Animals ate it.
   • It has used up its food store.
   Check

8. 8. What happens to a bean seed soaked in water overnight?

   • It gets smaller.
   • It dissolves.
   • It turns into a flower.
   • It swells and gets bigger.
   Check

9. 9. Which conditions do seeds need to germinate?

   • darkness and freezing cold
   • light, cold and dry soil
   • water, air and warmth
   • only light
   Check

10. 10. Junaid's results: warm and light 10, warm and dark 15, cold and light 5, cold and dark 7 seeds. Do seeds need light to germinate?

    • Yes, dark seeds died.
    • No, more germinated in the dark.
    • Yes, only light seeds grew.
    • No seeds germinated.
    Check

11. 11. Junaid's results: warm and light 10, warm and dark 15, cold and light 5, cold and dark 7. Which conditions were best?

    • cold and dark
    • warm and light
    • warm and dark
    • cold and light
    Check

12. 12. Class 5 put seeds in bags in different places and checked them after three days. Look at the bar chart. How many seeds germinated in the freezer?

    • 0
    • 4
    • 10
    • 9
    Check

13. 13. In the jar test, one jar has dry soil and one has moist soil. What is the factor you change?

    • the number of seeds
    • whether the soil has water
    • the place the jars are kept
    • the type of jar
    Check

14. 14. Why is it better to use ten seeds in each jar instead of five?

    • It is easier to count.
    • Ten seeds grow faster.
    • It uses less soil.
    • The results are more reliable.
    Check

15. 15. Why did the class observe the seeds for eight days?

    • It was a holiday.
    • So the soil dries out.
    • Germination takes time.
    • Seeds only grow on day eight.
    Check

16. 16. Which of these seeds is known to have germinated after the longest time?

    • a one-year-old rice grain
    • a 1300-year-old lotus seed
    • a 10-year-old bean
    • a 50-year-old apple seed
    Check

17. 17. Why are pesticides a problem for bees?

    • They can kill bees or make it hard for them to fly and find food.
    • They make flowers bigger.
    • They help bees make honey.
    • They give bees more nectar.
    Check

18. 18. Look at the bar chart. Where did the most seeds germinate?

    • in the freezer
    • only on top of the desk
    • in the drawer and on top of the desk
    • in the fridge
    Check

19. 19. The same number of seeds germinated in the dark drawer and on top of the desk in the light. What does this suggest?

    • Seeds don't need water to germinate.
    • Seeds don't need light to germinate.
    • Seeds need light to germinate.
    • Seeds need to be cold to germinate.
    Check