The heat resource for our planet is the sun. Power from the sun is transferred through space and v the earth"s setting to the earth"s surface. Since this power warms the earth"s surface and also atmosphere, several of it is or becomes warmth energy. There room three ways warm is transferred into and also through the atmosphere:



If you have stood in front of a fireplace or close to a campfire, you have actually felt the heat transfer recognized as radiation. The side of girlfriend nearest the fire warms, when your various other side remains unaffected through the heat. Back you room surrounded through air, the air has nothing to perform with this move of heat. Warmth lamps, that store food warm, occupational in the exact same way. Radiation is the transport of heat power through space by electromagnetic radiation.

You are watching: The direct transfer of energy by electromagnetic waves

Most of the electromagnetic radiation that involves the earth from the sunlight is in the form of clearly shows light. Light is do of tide of different frequencies. The frequency is the number of instances the a repeated event occurs, over a collection time. In electromagnetic radiation, the frequency is the number of times one electromagnetic tide moves past a point each second.

Our brains interpret these different frequencies right into colors, consisting of red, orange, yellow, green, blue, indigo, and violet. As soon as the eye views all these various colors in ~ the very same time, that is taken as white. Waves from the sun which we cannot see space infrared, which have lower frequencies 보다 red, and also ultraviolet, i m sorry have higher frequencies than violet light.

Most the the solar radiation is soaked up by the atmosphere and also much of what reaches the earth"s surface ar is radiated ago into the setting to end up being heat energy. Dark fancy objects such together asphalt absorb an ext of the radiant energy and also warm faster that irradiate colored objects. Dark objects likewise radiate their energy faster than lighter colored objects.


Conduction is the move of heat energy from one problem to another or in ~ a substance. Have actually you ever left a metal spoon in a pot the soup gift heated on a stove? after a brief time the manage of the spoon will become hot.

This is as result of transfer that heat power from molecule come molecule or from atom to atom. Also, once objects room welded together, the steel becomes hot (the orange-red glow) through the transport of heat from one arc. This is referred to as conduction and also is a really effective technique of warm transfer in metals. However, wait conducts warm poorly.


Convection is the transport of heat energy in a fluid. This form of heater is most typically seen in the kitchen as soon as you watch liquid boiling.


Air in the setting acts together a fluid. The sun"s radiation strikes the ground, therefore warming the rocks. Together the rock"s temperature rises as result of conduction, heat power is released right into the atmosphere, developing a balloon of air which is warmer than the bordering air. This bubble of wait rises right into the atmosphere. As it rises, the bubble cools through the heat contained in the bubble moving into the atmosphere.

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As the warm air mass rises, the wait is replaced by the bordering cooler, much more dense air, what us feel as wind. These activities of air masses have the right to be little in a certain region, together as local cumulus clouds, or big cycles in the troposphere, covering large sections that the earth. Convection currents are responsible for numerous fads in the troposphere.