Chapter 5 NAS

The magnitude of pressure exerted by the gas molecules composing air depends on

Usually, the air pressure inside a building is _____ the air pressure outside the building.

So that barometer readings are accurate and representative,

The average air pressure at sea level is

The usual world-wide range in sea-level air pressure is ______ 100 mb.

Between the tropopause and stratopause, the air pressure ______ with increasing altitude.

The top of the atmosphere is at an average altitude of __________ km.

What fraction of the atmosphere's mass is below an aircraft flying at the 600 mb level?

What fraction of the atmosphere is below the 500 mb level?

The state of the atmosphere averaged for all latitudes and seasons is known as

The elevation of the 500-mb surface

At an altitude of about 3.5 mi above sea level, the air pressure is approximately

At sea level, the pressure of the atmosphere is

The type of barometer that is used to measure altitude

A(n) ______ can be used to predict the weather by keeping track of the air pressure tendency

An air-pressure altimeter is actually a(n) ______ barometer

Within the thermosphere, the temperature is ______ and heat energy is ______.

When air pressure readings at Denver (the "mile-high city") are adjusted to sea level, barometric pressure readings are

Adjusting barometer readings to sea level removes the influence of ______ on air pressure.

Changes of air pressure in the horizontal are ______ they are in the vertical

An air mass is a huge volume of air that is relatively uniform horizontally in

Air pressure decreases ______ with increasing altitude.

The concentration of oxygen (O2) in parts per million by volume ______ with increasing altitude within the troposphere.

The temperature of rising parcels of unsaturated air __________ because of __________.

At the same pressure, ______ air is less dense then______ air.

At the same pressure, warm and humid air is ______ equally warm and dry air.

At the same temperature and pressure, humid air is ______ dry air.

Relatively high surface air pressure is usually accompanied by ______ weather whereas relatively low surface air pressure is usually accompanied by ______ weather.

The tropopause at a particular location is generally ______ in winter than in summer.

If the surface air pressure is the same everywhere, but a mass of cold air is situated next to a mass of warm air, the pressure at high altitudes is

With the same volumes, a cold and dry air mass exerts ______ surface air pressure than a warm and humid air mass.

With the same volumes, a warm and dry air mass exerts ______ surface air pressure than an equally warm but humid air mass.

When a warm and humid air mass replaces a cold and dry air mass at a particular locality, the air pressure at Earth's surface usually

The decline of air pressure with altitude is most rapid in ______ air masses.

Because of the usual seasonal change in average temperature, the troposphere is denser in __________ than in __________.

Compared to horizontal pressure gradients, vertical pressure gradients are

Changes in air pressure with time at a particular locality may be explained by

With cold air advection in winter, the air pressure tendency is usually

Air pressure tendency is usually _____ with warm air advection in the winter.

Two weather stations (A and B) at sea level report the same surface air pressures. Warm air is above Station A while relatively cold air is above Station B. At an altitude of 25,000 feet, one would expect the pressure above Station A to be

Highs and Lows are identified on surface weather maps by areas enclosed within isobars. Which one of the following statements about Highs is true?

Lows and Highs are identified on surface weather maps by areas enclosed within isobars. Which one of the following statements about Lows is true?

A variable of state in the atmosphere:

Air pressure ______ decreases with altitude in the atmosphere.

According to the gas law, air pressure is directly proportional to

As a mass of arctic air invades our locality, air temperature ______ and air density ______.

As a mass of warmer and more humid air invades our locality, air temperature _____ and air density _____.

Rising parcels of unsaturated air cool at a _________ rate than rising parcels of saturated (cloudy) air.

The _________ adiabatic lapse rate is 9.8 Celsius degrees per 1000 m.

Descending air warms at