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anemometer

an instrument used to measure wind speed

wind vane

an instrument used to determine the direction the wind is blowing

rain gauge

Measures how much precipitation has fallen

thermometer

Measures the temperature of the air

hygrometer

Measures the humidity in the air

humidity

the amount of water vapor in the air.

low pressure area

rising air that is warmer than surrounding air masses and is associated with stormy weather

high pressure area

sinking air that is cooler than surrrounding air masses and is associated with sunny, fair weather.

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