Mrs. Cochrane-Sun, Moon, and Planets Inv. 3

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Terms in this set (...)

air
the mixture of gasses surrounding the Earth
air pressure
the force exerted on a surface by the mass of the air around or in contact with it
atmosphere
the layer of gases surrounding Earth. The layers include the troposphere, stratosphere, mesosphere, thermosphere, and exosphere
barometer
a weather instrument that measures air pressure
compressed
forced into a smaller space
forecast
a prediction about what kind of weather to expect
humidity
water vapor in the air
hygrometer
a weather instrument that measures humidity
mass
the amount of material in something
matter
anything that takes up space and has mass
meteorologist
a scientist who studies the weather
precipitation
rain, snow, sleet, or hail that falls from the clouds
pressure
the push when compressed air pushes back
temperature
a measure of how hot something is
thermometer
a weather instrument that measures temperature
troposphere
the region of the atmosphere that begins at Earth's surface and extends upward
for 9 to 20 km. Weather happens in the troposphere.
weather
the condition of the air around us. Heat, moisture, pressure, and movement are four important variables that determine weather.
weather variables
data that meteorologists measure - these include temperature, wind speed and direction, air pressure, cloud cover, and precipitation
wind
air in motion
wind vane
a weather instrument that indicates wind direction
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