6th Grade Earth Science Review

How does heat flow in the mantle?

• Magma is heated becomes less dense and rises. Then cools and sinks.

• Magma is heated becomes more dense and rises. Then cools and sinks.

• Magma is heated becomes less dense and sinks. Then cools and rises.

• Magma is heated becomes more dense and sinks. Then cools and sinks.

Your hand becoming warmer when holding a hot mug is an example of what type of heat transfer?

• Radiation

• Convection

• Conduction

• Currents

Convection within the atmosphere and the oceans is powered by

• heat from the sun.

• winds.

• gravity

• the tilt of the Earth.

Winds move from areas of high pressure to areas of low pressure. What causes these differences in air pressure?

• Gravity differences.

• Unequal heating of the atmosphere and surface of the Earth.

• Wind chill.

• The rise and fall of the tides.

Most of Earth's freshwater is found in

• groundwater

• rivers and streams

• ice

• oceans

About what percent of the Earth's water is salt water?

• Around 10%

• Around 1/4

• Around 50%

• Greater than 90%

A _______________ is a rapidly rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud.

• hurricane

• thunderstorm

• tornado

• snow storm

A _________ is a type of storm called a tropical cyclone, which forms over tropical or subtropical waters.

• hurricane

• tornado

• thunderstorm

• snow storm

What causes waves?

• Wind

• The gravitational pull of the moon.

• Convection currents.

• Upwelling.

What causes tides?

• Wind

• The gravitational pull of the moon.

• Convection currents

• Upwelling