Science one-word quiz

Write a one-word answer for each question.

1. The hard natural substance that is the hardest known

2. The planet famous for its bright rings

3. Animals that eat only plants are called

4. The part of a plant that absorbs water from the soil

5. The star at the centre of our solar system

6. The natural satellite of the Earth

7. The largest organ of the human body

8. Water vapour changing back into liquid water

9. The process by which green plants make their food

10. The force that pulls objects towards the Earth

11. The layer of air around the Earth

12. The planet known as the Red Planet

13. Animals that eat both plants and animals are called

14. The instrument used to measure temperature

15. The organ that pumps blood around the body

16. Frozen water is called

17. Animals that eat only other animals are called

18. Water changing into vapour is called

19. The green pigment in leaves

20. The planet closest to the Sun

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