Weather

A(n) is a large body of air that has the same properties as the Earth's surface over which it develops.

• air mass

• cloud

• tornado

• front

A violent, whirling wind that moves in a narrow path over land is a __.

• thunderstorm

• tornado

• hurricane

• front

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

• front

• storm

• climate

• flood

Precipitation and storms occur .

• in high-pressure systems

• in polar zones

• in low-pressure systems

• at fronts

Most hurricanes

• are intense low-pressure systems

• gain energy when they strike land

• are intense high-pressure systems

• travel west to east

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

• meteorologist

• geologist

• station model

• biologist

Violent storms generally form along .

• occluded fronts

• cold fronts

• warm fronts

• stationary fronts

To keep track of high-and low-pressure areas, weather maps are drawn with lines connecting points of equal atmospheric pressure. These lines are called .

• isotherms

• equibars

• fronts

• isobars

forms when raindrops pass through a layer of freezing air near Earth's surface, forming ice pellets.

• Fog

• Sleet

• Hail

• Rain

forms when the air temperature is below freezing and water vapor changes directly to solid.

• Rain

• Snow

• Sleet

• Hail