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Human Impact on the Environment

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Across

9. Rain or snow with an acid pH that makes soil and water on Earth more acidic

12. The effect CFC’s have on our ozone layer

14. Ecological areas identified to be rich in biodiversity and are in much need of protection

16. O3 gas in our atmosphere

19. The part of Earth where all living things are found

23. Habitat destruction cause this reduction in the size of some populations

24. Air pollution composed of water vapor and chemicals from human activities

25. All rivers, lakes, streams, oceans, rivers, and ponds on Earth

26. Protected wetlands in the southern United States that is rich in organisms

Down

1. Ability of the Earth’s atmosphere to trap heat and keep us warm

2. The increase in concentration of some chemicals within organisms as you goes higher in a food chain

3. Chemicals once used as refrigerator coolants and aerosol can propellants affecting the Earth’s ozone layer

4. Greenhouse gas that cycle by the processes of photosynthesis and cellular respiration

5. Scientists trying to identify, manage, and protect natural areas where many organisms live

6. The death of all members of a species of organisms

7. Mixture of gases that surrounds the Earth

8. Burning these increases the amount of carbon dioxide in the Earth’s atmosphere

10. The main gas making up the Earth’s atmosphere

11. Scientists trying to repair ecosystems that are badly damaged

12. percent of Earth covered with freshwater suitable for drinking

13. Earth’s rock interior extending from the molten core to the crust

15. Increase in the average temperature of the Earth possibly due to an increase in the levels of carbon dioxide in the atmosphere

17. Variety of different types of organisms living in an area

18. percent of the Earth covered with water

20. Absorbs most of the sun’s harmful, ultraviolet rays before they reach Earth

21. Molecule that is damaged by too much ultraviolet radiation

22. Group of organisms that are important to the life of many other types of organisms in an ecosystem

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