Convection Currents

What is the driving force of currents in the oceans and atmosphere?

• Equal heating of the Earth by the sun

• Solar radiation heating only the oceans

• Solar radiation heating only the land surfaces

• Unequal heating of the Earth by the Sun

Heat flow in the oceans and the atmosphere is

• cool flows down- warm flows up

• cool flows up - warm flows down

• cools flows up- warm flows down

• cools flows down - warm flows down

Convection currents occur when _____________ energy transfers between two parts of a fluid

• potential

• kinetic

• heat

• electric

Convection currents occur in

• fluids

• solids

_______ is created by unequal heating of the Earth's surface.

• Conduction

• Radiation

• Wind

• River movement

Convection currents in the Earth's mantle are caused by

• Less dense hot magma moving downward

• Less dense hot magma moving upward

• Tectonic plate movement

• More dense cooler magma moving upward

Ocean currents are created by

• Dense cold water sinking

• Dense cold water rising

• Less dense water sinking

• Less dense warm water rising and more dense cold water sinking

_____heats the air directly above the earth.

• Radiation

• Convection

• Conduction

When air is heated it becomes

• more dense

• less dense

• heavier

• moist

When air moves into the upper atmosphere it becomes

• cool and heavy

• cool and light

• warm and heavy

• warm and light