Across
- 1. the change in state from a gas to a liquid
- 4. a sub-layer of the thermosphere containing ions
- 5. is the transfer of energy through space by visible light, ultraviolet radiation, and other forms of electromagnetic waves
- 11. Forms about 21 percent of the earth's atmosphere, and is the most abundant element in the earth's crust
- 12. the air is densest in this layer
- 13. an instrument used to measure air pressure
- 16. the degree or intensity of heat present in a substance or object
- 17. the layer of the atmosphere just above the stratosphere and below the thermosphere
- 19. the height of an object or point in relation to sea level or ground level
- 20. protects earths surface from UV rays
- 21. a type of vaporization of a liquid that occurs from the surface of a liquid into a gaseous phase that is not saturated with the evaporating substance
Down
- 1. a form of heat transfer where heat energy is directly transferred between molecules through molecular collisions or direct contact
- 2. water vapor and carbon dioxide
- 3. rain, snow, sleet, or hail that falls to the ground
- 6. the envelope of gases surrounding the earth or another planet
- 7. a sub layer of the thermosphere and the upper limit of the atmosphere where the atoms and molecules blend into space
- 8. a visible mass of condensed water vapor floating in the atmosphere, typically high above the ground
- 9. the transfer of energy by which a substance, such as a gas or liquid, is heated and the warmer, less dense fluid rises, then cools and becomes more dense and then sinks
- 10. the layer of the atmosphere just above the troposphere and below the mesosphere
- 14. Water vapor in a different form
- 15. the perceptible natural movement of the air, esp. in the form of a current of air blowing from a particular direction
- 18. mass/volume
- 22. the chemical element of atomic number 7, a colorless, odorless unreactive gas that forms about 78 percent of the earth's atmosphere