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ESRT 2 Air MassesPart 2

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Air PressureESRT 1

What is the dewpoint when the dry-bulb temperature is 8°C and the wet-bulb

temperature is 6°C?

3°C

Which ocean current warms the

climate of northwestern

Europe?

North Atlantic Current

Most of the air in the lower troposphere at the equatorial low-

pressure belt is:

A. Warm, moist, and risingB. Warm, dry, and rising

C. Cool, moist, and sinkingD. Cool, dry, and sinking

A.

What is the dewpoint when the air

temperature is 26°C and the relative

humidity is 77%?

22°C

At which position should the measurements from a rain

gauge be recorded?

D

In which planetary wind belt do most storms move toward

the northeast?

A. 30 N to 60 N⁰ ⁰B. 0 to 30 N⁰ ⁰C. 0 to 30 S⁰ ⁰

D. 30 S to 60 S⁰ ⁰

A.

What is the dewpoint if the relative humidity is

100% and the air temperature is 20°C?

20°C

An air mass classified as cT

usually forms over which type of

Earth surface?

Warm land

On a cold winter day, the air temperature is 2°C

and the wet-bulb temperature is –1°C. What is the relative

humidity at this location?

51%

Convert -8°F to Celsius

-22°C

The direction of movement of the major surface ocean

currents is most affected by Earth’s…

A. Tilted axis B. Prevailing winds

C. Rate of revolution D. Tidal action

Prevailing Winds

Which weather variable generally

decreases when wind speed is increasing,

clouds are thickening and visibility drops?

Air Pressure

Which weather information shown at station B was measured with an anemometer

and weather vane?

A. B. 34 C. D. 138

A

What are the dewpoint and wind direction shown

on the station model below?

72°F and wind from the southeast

On the board…correctly draw a station model using the following

information?

Dewpoint: 48°FAir pressure: 998.3 mb

Wind: from the southeastWind speed: 10 knots

983

48

Jet stream winds over the United States generally

move from _______ to _________.

West to East

Which atmospheric conditions describe the air

mass that is influencing weather conditions at

location C?

Warm and moist

What is the difference in the air temperature and humidity between a

cP and mT air mass?

A. The cP air mass is warmer and less humidB. The cP air mass is colder and more humidC. The mT air mass is warmer and more humid

D. The mT air mass is colder and less humid

C

Which cross section below best represents the conditions that cause

early winter lake-effect snowstorms in New York State?

A

B

C

D

A

Which geographic region is the most common source

region for the mT air masses that move into

New York State?

Gulf of Mexico

What was the most likely dewpoint at this location and

why?A. 70 F⁰B. 61 F⁰C. 47 F⁰D. 32 F⁰

61 F…because the ⁰dewpoint and air

pressure need to be close together in order for precipitation to be

occurring.

Explain why Chicago has the lowest relative

humidity.

Because the difference between the dewpoint and air temperature is

the greatest.

Why are clouds forming at location

2?

Because the air is expanding and

cooling to reach the dew point.

At which location would thunderstorms most likely be

occurring?

Z because it is closest to a cold

front.

State the relationship

between temperature and

pressure.

As air temperature increases, air

pressure decreases.

Make your wager

Final Answer

Final Question