20.2-20.3

20.2-20.3

Earth Science 9th Grade

Multiple Choice

What forms at the boundary between two different air

masses of different properties?

• a front

• a hurricane eyewall

• a storm surge

Multiple Choice

Air masses are classified according to the

• Temperature and moisture

• speed of their movement

• surface over which they form

• direction in which they move

Multiple Choice

A warm front forms when

• cold air moves up over warmer air

• a warm air mass meets another air mass of the same temperature

• warm air glides up over colder air

• the temperature in a warm air mass increases

Multiple Choice

A cold front forms when cold, dense air moves into a region occupied by warmer air.

• True

• False

Multiple Choice

Middle-latitude cyclones are fueled by

• Air high up in the Atmosphere

• Air low in the Atmosphere

• Polar continental air masses

Multiple Choice

A storm that produces lightning and thunder is a thunderstorm

• true

• false

Multiple Choice

Which of the following is NOT generally associated with a

thunderstorm?

• tornado

• lightning

• warm air

• cold front

Multiple Choice

A violent windstorm that forms a rotating column of air

called a vortex is a

• Tornado

• Hurricane

• thunderstorm

Multiple Choice

Hurricanes produce sustained winds of at least

• 50 km per hour

• 119 km per hour

• 200 km per hour

• 250 km per hour

Multiple Choice

What is a hurricane?

• Tropical cyclone

• middle-latitude aintcyclone

• tropical anticyclone

Multiple Choice

Which of the following is NOT a characteristic of the eye of

a hurricane?

• has the storm's strongest winds

• is at the storm's center

• has no precipitation

• is warm because of descending air