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Science Exercise 9

Key stage 3 Science Exercise

1. Ceramics are hard but very __________ .

2. Ceramics are not _________ .

3. Composites are made of _______ different types of materials.

4. The pH scale measures the strength of acids and ________ .

5. The pH scale ranges from 0 to _______ .

6. A pH less than _______ is an acid.

7. A pH of _________ is neutral.

8. A pH greater than _______ is an alkali.

9. During photosyntheses carbon dioxide is removed from the air by _______ .

10. Carbon is passed on to ________, when the plants are eaten by animals.

11. Earth's atmosphere contains different _______ .

12. Earth's atmosphere contains nitrogen, oxygen, argon and _______ .

13. There are _____ types of energy stores.

14. There are ________ methods of transferring energy.

15. Energy can be transferred from one store to another by heating, radiation, electrically and ________.

16. Renewable energy resources are wind, water, solar, and ________ energy.

17. Non-renewable energy resources are fossil fuels and ________ energy.

18. The number of unit of electricity used in household is measured by ________ .

19. Non-renewable energy resources are fossil fuels and ________ energy.

20. _______ shows us the amount of energy in a food.

Answers:1. brittle 2. flexible 3. two or more 4. alkalis 5. 14 6. 7 7. 7 8. 7 9. green plants 10. animals 11.gases 12. carbon dioxide 13. 7 14. 4 15. mechanically 16. biomass 17. nuclear 18. electricity meters 19. nuclear 20. Food label

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