| A | B |
|---|
| insolation | The solar enerby that reaches and warms Earth's surface. |
| troposphere | The layer of gases closest to Earth's surface. Most weather takes place in this layer. |
| Weather | the condition of the troposphere at a particular time and place. |
| air pressure | The force put on a given area by the weight of the air above it. |
| humidity | The amount of water vapor in the air. |
| global wind | The wind that blows steadily in a predictable direction over long distances. |
| barometer | Measures atmospheric pressure. |
| anemometer | Measures wind speed. |
| weather vane | It shows the direction in which the wind is blowing. |
| Cirrus Clouds | these form at the highest altitudes from ice crystals. |
| cumulus | Puffy clouds that form at middle altitudes. |
| Stratus | Clouds that form in blanketlike layers at low altitudes. |
| air mass | a large region of air that has a similar temprature and humidity throughout. |
| front | the meeting place between air masses. |
| weather map | This shows the weather in a specific area. Symbols are used to represent different variables. |
| thunderstorm | a rainstorm that includes lightning and thunder. |
| blizzard | A snowstorm with 35 mph wind and enough snowfall that you can only see up to one quarter of a mile. |
| tornado | A rotating, funnel-chaped cloud with wind speeds up to 300 mph. |
| hurricane | A very large swirling storm with very low pressure at the center, and wind speeds greater than 74 mph. |
| storm surge | a bulge of water in the ocean caused by hurricanes waves and winds. |
| cyclone | Any storm with a low-pressure center that causes a circular pattern of winds. |
| climate | The average weather of a place. |
| current | The constant movement of ocean water. |
| rain shadow | The dry area on the leeward side of the mountain. |
| El Niño | The change in weather casued by the sinking of the cold current in the Pacific Ocean. |
| meteorologist | The scientists who study weather. |
