Weather Exam 1 Review

Winds are caused by differences in 

• precipitation
• humidity
• air pressure
• turbulance

When temperature decreases to the dew point, the water vapor in the air _____________?

• condenses

• evaporates

• stays the same

• Gets warmer

Wind speed may be measured with ---

• thermometer
• anemometer
• barometer
• windsock

The actual amount of water vapor in the air is called

• air pressure
• humidity
• relative humidity
• dew point

____________ is any form of water that falls from clouds and reaches Earth's surface

• snow
• precipitation
• rain 
• sleet

How do clouds form?

• Liquid water is heated and evaporates and becomes water vapor in the atmosphere.
• Water vapor in the atmosphere cools and condenses to become tiny liquid water droplets in the atmosphere.
• Tiny liquid water droplets float upwards and gather together in the atmosphere to form a cloud.

Instrument used for measuring air pressure

• thermometer

• anemometer

• pyschrometer

• barometer

Instruments used to measure wind

• psychrometer, hygrometer

• wind vane, hygrometer

• thermometer, anemometer

• anemometer, wind vane

Psychrometer/ Hygrometer

• measures rain fall

• measures wind speed & direction

• measures humidity

• measures temperature

Which condition would most likely produce rain?

• High Pressure

• Warm Temperatures

• Air Temperature and Dew Point Being Close together

• Rapidly decreasing elevation of the top of a cloud