Across
- 3. Thermal heat and thermal energy
- 5. A major source of oxygen for the Earth's atmosphere
- 7. the presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects.
- 8. the process by which radiation from a planet's atmosphere warms the planet's surface
- 10. produced during photosynthesis
- 15. forms 78 percent of the atmosphere
- 16. water in the gas state
- 18. the permanent removal of trees
- 20. the lowest region of the atmosphere
- 21. simplest form of hydrocarbon
- 22. plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
- 24. the outer layer of the thermosphere, extending outward into space
- 25. cultivating something excessively
Down
- 1. the lower part of the thermosphere, where electrically charged particles called ions are found.
- 2. the layer of the earth's atmosphere above the troposphere,
- 4. produced during the burning of fossil fuels
- 6. the region of the atmosphere above the mesosphere
- 9. preventing the planet from cooling and from having liquid water on its surface.
- 11. A greenhouse gas process that gets sent into the atmosphere
- 12. At elevated temperatures, nitrous oxide is a powerful oxidizer similar to molecular oxygen
- 13. change in atompsheric tempuratures due to human impacts
- 14. the region of the earth's atmosphere above the stratosphere
- 17. the result of the weight of a column of air pushing down on an area
- 19. decomposition of buried dead organisms, containing organic molecules originating in ancient photosynthesis that release energy
- 23. a form of oxygen gas, absorbs ultraviolet rays
- 26. Absorbs any type of greenhouse gases