Across
- 3. when liquid water is heated up and turned into vapor
- 5. a gradual increase in overall temp. of earths atmosphere
- 8. formed in the geological past from the remains of living organisms
- 9. process by which plants make their own food using carbon dioxide water and sunlight
- 11. the transfer of heat through the movement of a fluid
- 13. height above sea level or the earths surface
- 16. lowest layer of the atmosphere that contains most of the water and gasses; where weather occurs
- 18. all living things in the world
- 19. middle layer of the atmosphere; where meteoroids burn up
- 21. thin layer of gases that forms around the Earth
- 23. produced during photosynthesis
- 24. the transfer of energy through matter or space as visible light or infred
- 25. the measure of how hot and cold something or somewhere is
Down
- 1. the transfer of heat through direct contact of materials of different temp.
- 2. produced during the burning of fossil fuels
- 4. the planet on which we live
- 6. found mainly in underground deposits and widely used as fuel
- 7. area of strong winds near the top of the troposphere
- 10. force from a column of air pressing down
- 12. a form of oxygen gas absorbs ultraviolet rays form the sun and releases some of this energy in form of heat
- 14. the hottest layer of the atmosphere
- 15. a continuous area
- 17. having a wavelength shorter than that of the violet end of the visible spectrum
- 20. an individual animal plant or single celled life form
- 22. the layer that is above the troposhere and which temp. increases as altitude increases