Meteorology Flashcards
From a standpoint of weather, ______ is the most important component of the air.
Water vapour
The most important property of the atmosphere is ______.
Expansion
The ICAO standard atmosphere for the continent of North America assumes ______.
The air is a perfectly dry gas.
Most of the “weather” occurs in the _____ because of the presence of water vapour and strong vertical currents.
Troposphere
In the ICAO standard atmosphere the rate of decrease of temperature with height is ______ per 1000 feet.
1.98 degrees Celcius
Clouds from which precipitation falls are designated _______ clouds.
Nimbus
In the new METAR weather reporting code the sky is divided in 8 segments called okras. The sky condition FEW means that _____ okras (8ths) or less of the sky is covered by clouds.
2
Lines on a weather map that join areas of equal barometric pressure are called _________.
Isobars
Where the isobars are very close together, the pressure gradient is steep and the wind is _______.
Strong
A _____ is a rapid and irregular fluctuation in wind speed and direction caused by mechanical turbulence and unequal heating of the earth’s surface.
Gust
When a given mass of air is heated and no new water vapour is added, the relative humidity of the air _______.
Decreases
Air that will resist upward or downward displacement and tends to return to its original horizontal level is said to be ______.
Stable
The temperature that air must be cooled at a constant pressure to become saturated is called ______.
Dew point
The dangers associated with the passage of a thunderstorm are ______.
Strong, gusty winds and turbulence.
Heavy rain and hail.
Lightning
Warm air is _____ than cold air and therefore tends to _____.
Less dense, rise
