When the ______ is 50%, the air contains 50% of the water needed for the air to be saturated.

• relative humidity
• humidity
• front
• dew point

When water is cooled to its dew point, it forms a cloud on the ground called _____.

• cumulus
• precipitation
• fog
• condensation

Rain, snow, sleet, and hail are all forms of _____.

• precipitation
• condensation
• evaporation
• climate

A violently rotating column of air called a _____ when it comes in contact with the ground.

• hurrican
• tornado
• trade wind
• local wind

A(n) _____ is a large body of air that has properties similar to the part of Earth's surface over which it depends.

• tornado
• pressure system
• front
• air mass

When two air masses meet, there is a _____, or boundary.

• thunderstorm
• watch
• front
• cloud

A _____ is a large, swirling, low-pressure system that forms over the Atlantic Ocean.

• blizzard
• cold front
• tornado 
• hurricane

A(n) ____ is a line that connects points of equal temperatures on a weather map. 

• station model
• occluded front
• isotherm
• isobar

A _____ is a person who studies the weather.

• meteorologist
• geologist
• weatherologist
• hydrologist

What role do oceans play in hurricane formation?

• they provide cool, dense water
• warm water supplies energy to hurricanes
• warm ocean water slows hurricane formation
• cold ocean water supplies energy to hurricanes