Air Pressure and Relative Humidity

Which map best represents the surface wind pattern associated with high-pressure and low-pressure systems in the Northern Hemisphere?

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Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Which weather-station model shows an air pressure of 993.4 millibars?

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Tags

NGSS.MS-ESS2-5

Why can't you see the water vapor in the air?

• It exists as a clear, colorless gas

• It's all been condensed

• There is very little of it

• It's all far away, in the upper atmosphere

If the air is only holding one-third as much moisture as it can possibly hold, what is the relative humidity?

• 25 percent

• 50 percent

• 33 percent

• 67 percent

What will happen if the relative humidity is 100 percent, and the temperature begins falling?

• It will start to rain

• The air will be sticky and uncomfortable

• The temperature will rise

• The barometric pressure will rise

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Which of the following devices measures air pressure?

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Tags

NGSS.MS-ESS2-5

What are the characteristics of a high-pressure system?

• Wind and rain

• Humidity and thunder

• Extremely hot temperatures

• Clear skies and sun

Tags

NGSS.MS-ESS2-5

________is the instrument used to measure air pressure.

• barometer

• thermometer

• mercury

• watch

Pressure is the effect of

• the weight of all the air above pressing down

• water vapor in the atmosphere

• greenhouse gases

• solar radiation

Tags

NGSS.MS-ESS2-5

What happens to air pressure as altitude increases?

• It increases

• It decreases

• It remains constant

• It fluctuates unpredictably