Definition: An instrument for determining the pressure of the atmosphere and hence for assisting in forecasting weather and for determining altitude.
Definition: global warming is caused by a build up of greenhouse gases such as CO2 trapping heat.
Definition: An area in which the air is more dense than in surrounding regions, causing outward-blowing winds.
Definition: An area in which the air is less dense than in surrounding regions, causing inward-blowing winds.
Green house affect
Definition: The warmth given off by the sun's infrared rays is trapped within Earth's atmosphere by the gas carbon dioxide (CO2) in the atmosphere.
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