Chapter 13 Lesson 1: Describing Weather

What is the term for scientists who study and predict weather?

• Meteorologists

• Biologists

• Geologists

• Astronomers

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Air _______ is the measure of the average kinetic energy of molecules in the air.

• temperature.

• pressure.

• density.

• humidity.

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Air pressure decreases as altitude _______.

• increases.

• decreases.

• remains the same.

• fluctuates.

A(n) _______ is an instrument used to measure air pressure.

• barometer.

• thermometer.

• hygrometer.

• anemometer.

In a south wind, the wind is coming from the _______.

• south.

• north.

• east.

• west.

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The instrument used to measure wind speed is a(n) _______.

• anemometer.

• barometer.

• thermometer.

• hygrometer.

The amount of water vapor in the air is _______.

• humidity.

• temperature.

• pressure.

• density.

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When air is _______, it holds the maximum amount of water vapor possible at that temperature.

• saturated.

• dry.

• cold.

• humid.

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Relative humidity is reported as a(n) _______.

• percent.

• degree.

• ratio.

• fraction.

The temperature at which air becomes fully saturated because the temperature decreases while the amount of moisture stays constant is the _______.

• dew point.

• boiling point.

• freezing point.

• melting point.