Convection Currents

If differences in air pressure produce winds, what can you conclude about temperature and air pressure based on the figure?

• As warm air rises, it creates an area of lower pressure, and cooler air flows in as wind
• Warm air is denser than cold air is, creating an area of high pressure the produces wind.
• Winds flow from areas of low pressure to areas high pressure when temperature is warmer
• Air pressure decreases at night because temperature is lower, producing land and sea breezes

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NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

At the seashore late in the afternoon on a hot day, a person often feels a strong breeze coming from the ocean because...

• the pounding waves generate air currents
• warm air over the ocean rushes in to replace the cool air that rises over the land
• the heavy, cool air over the ocean rushes in to replace the warm air that rises over the land
• there are no clouds to block the wind coming in from the ocean

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NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Heat transfer by convection is caused by differences in what two things:

• Thickness and material

• Weight and electricity

• Temperature and density

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

Energy for convection in the atmosphere and hydrosphere comes from...

• The sun
• The moon
• Solar winds
• The ocean

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NGSS.MS-ESS2-4

NGSS.MS-ESS2-6

In convection, COOL air

• Rises
• Sinks

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NGSS.MS-ESS2-6

In convection, WARM air

• Rises
• Sinks

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NGSS.MS-ESS2-6

What is one role of the ocean in convection?

• to provide a home for animals
• to absorb & release heat
• To surf on
• To drink from

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NGSS.MS-ESS2-6

The Gulf Stream is a current that brings warm ocean water from the south (near Florida) to the north (Europe). What type of heat transfer is this?

• conduction

• convection

• radiation

• Insolation 

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NGSS.MS-ESS2-6

Convection currents happen inside the Earth. Magma is heated by ______ and rises towards the crust.

• the sun

• the core

• plate tectonics

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NGSS.MS-ESS2-1

Which of the following best describes this diagram?

• The oceanic crust is moving under the continental crust because it is denser

• The trench is froming a lake of water along the edge of the lithosphere.

• Mountains are forming because 2 contiental crust are converging.

• The ocean water will put out the fire caused by the volcano.

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NGSS.MS-ESS2-2