| A | B |
|---|
| Air mass | large body of air that has consistent temperature and moisture |
| Front | boundary between air masses, creates weather |
| Cold front | cold air moves in and under warm air |
| Warm Front | Warm air moves in and over the colder air |
| Occluded front | a warm air mass gets stuck over two colder ones |
| Stationary front | two air masses run out of energy andstop moving |
| Isobar | a line connecting points of equal pressure |
| atmosphere | gasses that surround and protect our earth |
| 4 layers of the atmosphere | troposphere, stratosphere, mesosphere and thermosphere |
| Conduction | transfer of energy by touch |
| convection | circulation of energy due to difference in temp & density (warm goes up, cool goes down) |
| radiation | transfer of energy in waves, comes from the sun |
| greenhouse effect | process that traps heat in to keep the earth warm |
| Global Warming | a gradual warming of the Earth's average temperature |
| air pollution | contamination of the atmosphere, can happen naturally or by humans |
| Lightning | most dangerous part of a thunderstorm |
| Hurricane | severe storm, develops over warm water, swirling winds |
| weather | conditions in the atmosphere at any specific time |
| climate | average conditions of the atmosphere in an area |
| Nimbo/Nimbus | cloud type that brings precipitation |
| 2 parts of weather that determine climate | temp. and precipitation |
