GMAS Review Grade 6 Science

How would you strengthen a hurricane?

• move over cold water

• move over land

• move over warm water

Why is water important in the formation of hurricanes?

• water produces the winds that move the hurricanes

• warm water allows for evaporation which produces the winds to fuel the hurricanes

• cold water produces the moisture that creates water vapor and energy to fuel the hurricane

• warm water produces the moisture that produces water vapor which in turn releases heat energy to fuel the hurricane

Thunderstorms are the result of which type of pressure system?

• Low

• High

Which leads to low pressure systems?

• warm air rising

• warm air falling

• cold air rising

• cold air falling

Why do hurricanes form more often at the end of summer?

• The ocean water is cooling off and creating more moisture in the air.

• The ocean water is cooling off and creating less water vapor in the ocean.

• The ocean water is much warmer which fuels the water cycle and creates lower air pressure.

• The ocean water is much warmer which fuels an increase in water vapor on the ocean's surface.

What is the wind speed that is necessary for a hurricane to form?

• more than 29 mph

• more than 39 mph

• more than 74 mph

• more than 94 mph

At what barometric pressure do hurricanes form?

• 1013 millibars

• 1000 millibars

• 980 millibars

• 790 millibars

How do oceans affect weather patterns?

• Ocean water is evaporating, decreasing the temperature and humidity of the surrounding air to form rain and storms.

• Ocean water currents transport warm water around the equator and cold water around the poles.

• Ocean water is constantly evaporating increasing the humidity and air temperature of the air around it.

• Ocean currents transport cold water from the equator throughout the earth.

Why do hurricanes form approximately 8 degrees away from the equator and not closer?

• The depth of the oceans at the equator are too deep for heating and forming hurricanes.

• The rotation of the earth is too strong to create the needed formation of clouds to start the creation of hurricanes.

• The Coriolis Effect is too powerful to form a hurricane.

• The rotation force is not strong enough to create the spin of the hurricane

What must be present for a hurricane to form. Check all that apply.

• Water temperatures over 80 degrees

• Great amounts of rainfall

• High humidity

• High pressure

• Low pressure