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10 Cards in this Set
- Front
- Back
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Atmosphere |
the mixture of gases that surrounds a planet; Earth’s atmosphere is mostly a mixture of oxygen and nitrogen |
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air pressure |
the density or the weight of air pressing down |
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weather |
the condition of the air or atmosphere at a particular time and place; determined by four main ingredients: temperature, humidity, wind speed and direction; and air pressure |
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climate |
how the atmosphere behaves over a long period of time at a certain location |
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meteorologist |
a weather forecaster; an expert with specialized education who observes, explains, and forecasts weather phenomena and patterns |
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humidity |
the amount of water vapor in the atmosphere |
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hydrosphere |
the total amount of water on a planet including liquid, vapor, and ice |
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THERMOMETER |
A THERMOMETER measures the air temperature. Most thermometers are closed glass tubes containing liquids such as alcohol or mercury. When air around the tube heats the liquid, the liquid expands and moves up the tube. A scale then shows what the actual temperature is. |
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BAROMETER |
A BAROMETER measures air pressure. It tells you whether or not the pressure is rising or falling. A rising barometer means sunny and dry conditions, while a falling barometer means stormy and wet conditions. An Italian scientist named Torricelli built the first barometer in 1643. |
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ANEMOMETER |
An ANEMOMETER measures wind speed. The cups catch the wind, turning a dial attached to the instrument. The dial shows the wind speed. |
