Chapter 7: Water Pollution Quiz

1. Litter such as plastic bags can ____ and kill aquatic animals.
6. Fertilisers and Pesticides run-off means that they are ___ by rain into rivers and seas.
10. Pesticides and ___ are very soluble in water and poisonous to aquatic animals.
12. ___ waste from industries kill ___ plants and animals.
13. Water helps to ___ substances through our blood circulatory system
14. Plants would ___ without water.
16. Layers of oil on the sea surface ____ air from entering the water.
17. Water supports ___ processes.
18. Water is a good ___ as it can dissolve a lot of substances.
20. Oil ___ gills of fish and cause them to die.
21. Oil also clump the ___ of birds together and they cannot fly.

2. There are ___ main sources of water pollution.
3. Water pollution can be reduced through ___ and enforcement of law.
4. Clean water is needed for ___ industries so that medicine is safe.
5. ___sewage brings harmful diseases to humans, causing them to fall sick.
7. Fertilisers run-off causes ___ to grow fast on the water surface. This prevent sunlight from reaching the bottom.
8. We use clean water for drinking and ___.
9. Oil ___ happen when the ships' tankers are damaged.
11. Desalination is more ___ because a large amount of energy is used to heat up seawater.
15. Desalination changes ___ water into fresh water.
16. Water is a ___ resource.
19. ___ is recycled waste water.
20. It is important to have ___ water.