Human Impact on the Environment
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