| Term | Definition |
| Atmosphere | The layer of gas that surrounds the earth |
| Air pressure | force of the atmosphere |
| Troposphere | Lowest - where earth weather occurs. 9-16km above the planet. For every increase of 100m the temp decreases about 6 degrees |
| Stratosphere | Second Lowest -12-50km above the earth. There are 2 layers the upper and the lower. Most weather balloons break because of pressure |
| Upper Stratosphere | Warmer than the lower because of the ozone layer |
| Mesosphere | The 3rd Lowest - 80km above the earth. The coldest part of the atmosphere. In is -90 degrees. Most meteoroids burn up here. |
| Thermosphere | Highest Level - 80-550km and to the end. Does not suddenely end. Very hot - 1800 degrese because sun strikes here first. |
| Ionosphere | Lower Part of Thermosphere - Ions are created and radio waves bounce off the ions. Aurora borealis |
| Exosphere | Upper Part of Thermosphere - 550km. Thousands of km satelities, TV, and phone signals |
| Visible Light | Light you can see |
| Infared Radiation | Light you cant see |
| Radiation | Heat direcctly from the source - cannot be seen |
| Conduction | The direct transfer of heat from one substance to another. OBJECTS ARE TOUCHING. Works best with solids |
| Convection | Transfer of heat by the movement of a fluid. Molecules can move through fluids and they take their heat with them. |
| Wind | The horizontal movement caused by changes in pressure |
| Unequal Heating of the Earth | Causes differences in pressure |
| Anemometer | used to measure wind speed |
| Wind-Chill factor | the wind moving over your skin decreases your temp |
| Local winds | winds that blow over short distances |
| Sea Breeze | Usually durring the day wind from over the ocean blow onto land because it is cool air moving to take warmer airs place because it rises |
| Land Breeze | Usually durring the night wind from ove the land blow onto the ocean because it is cool air mover to take warmer airs place because it rises |
| Global Convection Currents | The movement of air between the equator and the poles produce global winds due to the enequal heating of the earth |
| Global Winds | Wind over long distances |