Aviation weather test #1

Air is a

mixture

Ozone filters out most of the ____ radiation snlight

ultraviolet

Fog is just a low lying cloud

True

The wavelengths of radiation emitted by earth are _____ emitted by the sun

Longer than those

One billion tons of water falls every minute across the globe

True

For consistency, all meteorological observations are reported in

Universal time coordinated

On the average, how much of the sun’s energy that is intercepted by Earth is reflected back to space

30%

A closed pine cone tells you it is going to rain

true

This process involved the movement of a mass or a substance

Convection

Earth receives energy from the sun in this way

Radiation

Tornados have occurred in every U.S. state

true

The two most important heat absorbing gases in the lower atmosphere are

water vapor and carbon dioxide

Takeoff and landing is limited by factors such as

Visibility, Presence of hazardous weather, Runway conditions

Standard sea level pressure in millibars is

1013.15

The force that generates wind is

Pressure gradient force

Which factors influence the magnitude of the coriolis force

Both wind speed and latitude

A woolly bear caterpillar can tell you how severe the winter will be

False

Lines on a weather map connecting places of equal air pressure are called

Isobars

Weather that delays or cancel flights is inclement weather

True

Closely spaced isobars often indicate

High winds

Lightning is 5 times hotter than the sun

true

In the northern hemisphere the winds associated with a low pressure system (cyclone) blow

Counterclockwise and toward the center

In the northern hemisphere, winds associated with a high pressure system blow

Clockwise and outward from the center

Hurricanes spin clockwise in the southern hemisphere

True

If the earth were not rotating

Air would move directly from high to low preassure

Inclement weather is thunderstorms, snowstorms, wind shear, icing, and fog

true

Upper air winds

Are generally faster than surface winds

Low air pressure systems are usually associated with

Precipitation

A fast moving current of air found near the top of the troposphere is called the

Jet stream

Energy represents the ability

To do work

What is the technical name for a high pressure center

Anticyclone

The amount of water vapor in the air (by volume) usually does not exceed

4%

Wind direction is always given as

The direction the wind is coming from 

The two most abundant gases in the atmosphere by concentration are

Oxygen and nitrogen 

Sustained winds above 40 kts generally grounds most aircraft

True

Which way do high pressure systems move (northern hemisphere)

down, out, and clockwise

which way do low pressure systems move (northern hemisphere)

up, in, and counterclockwise

what is the jet stream created by

Earth’s rotation and the movements of air from the equator to the poles

What is radiation

Heat transport through electromagnetic waves

what does GR mean on a metar

hail