THERMOMETER, measures how hot or cold the air is, RAIN GAUGE, measures how much rain fell during a certain period of time, WIND VANE, direction of the wind, ANEMOMETER, measures wind speed, BAROMETER, measures air pressure of the atmosphere, WARM FRONT, occurs when a warm air mass moves up and over a cold air mass, STATIONARY FRONT, occurs when warm and cold air masses meet and neither air mass has the force to move the other. , COLD FRONT, occurs when a cold air mass quickly shoves a warm air mass upward., CIRRUS clouds , form at the highest altitudes; appear thin and curly on the ends, composed of ice crystals, Predict the oncoming of snowfall, CUMULUS clouds, form between cirrus and stratus clouds; appear puffy ,  STRATUS clouds, form at one of the lowest altitudes, like a layer of clouds; like a blanket ---- “overcast”,   indicate heavy rain or snowfall, LOW air pressure , BAD weather ------> Stormy, cloudy, or overcast, HIGH air pressure, GOOD weather ------>   Clear skies.

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