Weather Chapter 16

The temperature at which air is saturated and condensation forms is the __.

High, thin, white, feathery clouds containing ice crystals

precipitation forming when raindrops pass through a layer of freezing air near Earth's surface

precipitation that can break windows and destroy crops

Areas of low-pressure usually have ___.

___ fronts produce steady, gentle rain.

lines connecting points of equal atmospheric pressure

____ fronts produce violent thunderstorms

When severe weather conditions already exist, a(n) ___ is issued.

A ___ studies and forecasts the weather using data gathered from many sources.

A large body of air with the same properties as the Earth's surface over which it develops 

Raindrops pass through a layer of freezing air near Earth's surface, forming ice pellets

Air moving in a specific direction is called the ____.

High pressure means good weather because _____.

A(n) ___ shows weather conditions at one specific location.

stratus cloud that forms when air condenses near the ground

millions of water droplets become suspended in air and collect around small dust particles

Lightning is caused by

Fog is a ____ cloud that forms near the ground.

areas of descending air

As the temperature of air increases it can hold _____ water vapor.

Low, layered clouds that produce light precipitation

puffy, white clouds, often with flat bases

Precipitation and storms occur ____. (Choose the BEST answer.)

less dense, warm air that can be forced upward

water vapor changes directly to a solid

A measure of the average amount of motion of molecules is called the ____.

The boundary between cold and warm air masses is called a ____.

Thunder is caused by

Amount of water vapor air is holding compared to amt. needed for saturation at a specific temp.

A measure of the average amount of motion of molecules is called the _____.

Water can form on grass in the early morning when the air is clear because ____.

Rain, snow, sleet, and hail are examples of ____.

Forms when the air temperature is below freezing and water vapor changes directly to a solid

As the temperature of air increases, can it hold more water vapor or less water vapor?

Violent storms generally from along