Science one-word quiz

Write a one-word answer for each question.

1. The instrument used to measure atmospheric pressure

2. The instrument used to measure temperature

3. The pigment in red blood cells that carries oxygen

4. The force that pulls objects towards the Earth

5. The lightest gas

6. The planet famous for its bright rings

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

8. The planet known as the Red Planet

9. Animals that eat only other animals are called

10. The planet we live on

11. Animals that eat both plants and animals are called

12. The chemical symbol for gold

13. The bouncing back of light from a surface

14. The gas we breathe in to stay alive

15. The SI unit of electric current

16. The natural satellite of the Earth

17. The largest planet in the solar system

18. The organ we use for seeing

19. The study of living things

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

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