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- Earth axis
- The imaginary line passing through the north and south poles.
- Atmosphere
- The region of air between the earth's surface and outer space.
- Lithosphere
- The solid parts of the earth (land).
- Meteorology
- The study of the weather.
- Cumulus
- A cloud that usually forms near cold fronts.
- Cold front
- The forward edge of a cold air mass.
- Evaporation
- When water turns from a liquid to a gas at a temperature below boiling.
- Stratosphere
- The layer of air from about 16km to about 50km above the earth's surface.
- Typhoon
- A hurricane that forms over the pacific ocean.
- Squall line
- Thunderstorms that occur along a cold front.
- Barometer
- An instrument used to measure air pressure.
- Precipitation
- The condensation of moisture from a vaporous state into rain or snow.
- Anemometer
- An instrument used to measure wind speed.
- Relative humidity
- The amount of water vapor in the air relative to the amount that it can hold at A given temperature.
- Isobar
- Lines on a weather map indicating the same barometric pressure.
- Hurricane
- A violent tropical storm.
- Dew point
- The temperature at which water vapor condenses to liquid water.
- Cumulonimbus
- Storm clouds that bring thunderstorms.
- Meteorologist
- A person that studies weather and climatic conditions.
- Air
- The combination of gases which comprise the earth's atmosphere.
- Nitrogen
- The gas that makes up 78% of the air.
- Hydrosphere
- The liquid part of the earth.
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