Science one-word quiz

Write a one-word answer for each question.

1. The study of stars and planets

2. The smallest unit of life

3. Blood vessels that carry blood away from the heart

4. The planet closest to the Sun

5. The planet we live on

6. Water vapour changing back into liquid water

7. The chemical formula H2O stands for

8. Water changing into vapour is called

9. The force that pulls objects towards the Earth

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

11. The study of living things

12. Animals that eat both plants and animals are called

13. The largest organ of the human body

14. The planet known as the Red Planet

15. The organ that pumps blood around the body

16. The process by which a seed starts to grow into a plant

17. The control centre of a cell

18. The transfer of pollen from anther to stigma

19. Animals that eat only plants are called

20. The pigment in red blood cells that carries oxygen

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