heat transfer in the atmosphere

what drives atmospheric circulation

Different parts of the Earth receive different amounts of solar radiation. Which part of the planet receives the most solar radiation? The Suns rays strike the surface most directly at the Equator. The difference in solar energy received at different latitudes drives atmospheric circulation.

heat transfer in the atmosphere

Heat moves in the atmosphere the same way it moves through the solid Earth or another medium. What follows is a review of the way heat flows, but applied to the atmosphere. Radiation is the transfer of energy between two objects by electromagnetic waves. Heat radiates from the ground into the lower atmosphere. In conduction, heat moves from areas of more heat to areas of less heat by direct contact. Warmer molecules vibrate rapidly and collide with other nearby molecules, transferring their energy. In the atmosphere, conduction is more effective at lower altitudes, where air density is higher. This transfers heat upward to where the molecules are spread further apart or transfers heat laterally from a warmer to a cooler spot, where the molecules are moving less vigorously. Heat transfer by movement of heated materials is called convection. Heat that radiates from the ground initiates convection cells in the atmosphere (Figure 1.1). Click image to the left or use the URL below. URL:

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questions

the transfer of energy between two objects by electromagnetic waves.

-->  a) radiation

b) conduction

c) convection

d) connection

heat moving from more heat to areas of less heat by direct contact.

a) radiation

-->  b) conduction

c) convection

d) connection

conduction is more effective at higher altitudes, where air density is lower.

a) true

-->  b) false

solar energy coming through space is transferred by

a) conduction

b) convection

c) connection

-->  d) radiation

what drives the water cycle?

a) the earths core

b) the moon

-->  c) the sun

d) greenhouse gases

the suns rays strike the surface most directly at the equator.

-->  a) true

b) false

a spoon getting warmed by boiling water is an example of this.

a) radiation

-->  b) conduction

c) convection

d) connection

when air gets warmer

a) it goes upward

b) molecules move faster

c) molecules spread apart

-->  d) all of the above

why do the poles receive less solar radiation than the equator?

-->  a) the suns rays strike obliquely and only during the summer.

b) the suns rays strike directly but only during summer.

c) the suns rays strike obliquely in the winter and directly in the summer.

d) none of the above

diagram questions

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