Science one-word quiz

Write a one-word answer for each question.

1. The largest organ of the human body

2. The SI unit of electric current

3. The process by which green plants make their food

4. The positively charged particles in the nucleus of an atom

5. Energy possessed by a moving body

6. The organ we use for seeing

7. The pigment in red blood cells that carries oxygen

8. The transfer of pollen from anther to stigma

9. Animals that eat only other animals are called

10. The SI unit of mass

11. The star at the centre of our solar system

12. The smallest unit of life

13. The gas we breathe in to stay alive

14. Animals without a backbone are called

15. The powerhouse of the cell

16. The bending of light as it passes from one medium to another

17. The hard natural substance that is the hardest known

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

19. The study of stars and planets

20. The organ that pumps blood around the body

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