Heating of the AtmosphereHeating of the Atmosphere

What is Thermal Energy?What is Thermal Energy? Thermal means “heat.” Thermal means “heat.” Thermal energy is the heat made Thermal energy is the heat made

when molecules move. The faster when molecules move. The faster molecules move, the higher the molecules move, the higher the temperature.temperature.

RadiationRadiation

is the transfer of energy as is the transfer of energy as electromagnetic waveselectromagnetic waves

The earth receives only about two-The earth receives only about two-billionths of these wavesbillionths of these waves

Conduction is the transfer of thermal Conduction is the transfer of thermal energy from one material to another energy from one material to another by direct contact by direct contact

Thermal energy always moves from Thermal energy always moves from warm to cold areas warm to cold areas

When air molecules come into direct When air molecules come into direct contact with a warm surface, thermal contact with a warm surface, thermal energy is transferred to the energy is transferred to the atmosphereatmosphere

ConvectionConvection

Convection is the transfer of thermal Convection is the transfer of thermal energy by the circulation or movement of energy by the circulation or movement of a liquid or gasa liquid or gas

As the cool air sinks it pushes the warm As the cool air sinks it pushes the warm air upair up

The cool air is eventually heated by the The cool air is eventually heated by the ground and again begins to riseground and again begins to rise

This continual process of warm air rising This continual process of warm air rising and cool air sinking creates a circular and cool air sinking creates a circular movement of air called a convection movement of air called a convection current current

Conduction, Convection, Conduction, Convection, and Radiation Videoand Radiation Video

https://www.wisc-online.com/learn/https://www.wisc-online.com/learn/natural-science/earth-science/natural-science/earth-science/sce304/heat-transfer--conduction--sce304/heat-transfer--conduction--convection--radiationconvection--radiation

The Greenhouse Effect The Greenhouse Effect

The green house effect is the heating The green house effect is the heating of the Earth caused by gases in the of the Earth caused by gases in the Atmosphere trapping thermal Atmosphere trapping thermal energy.energy.

Greenhouse Effect VideoGreenhouse Effect Video

https://www.youtube.com/watch?https://www.youtube.com/watch?v=BPJJM_hCFj0v=BPJJM_hCFj0

Global Warming Global Warming

Gases in the atmosphere that do trap Gases in the atmosphere that do trap heat energy are called greenhouse heat energy are called greenhouse gases.gases.

A rise in average global A rise in average global

temperatures is called global temperatures is called global warming.warming.

Keeping the Earth Livable Keeping the Earth Livable Some scientists believe that global warming Some scientists believe that global warming

may be a natural processmay be a natural process Even so, many countries have signed a treaty Even so, many countries have signed a treaty

to find ways to decrease the production to find ways to decrease the production greenhouse gases greenhouse gases

One of these ways to decrease greenhouse One of these ways to decrease greenhouse gases is replanting trees when others are cut gases is replanting trees when others are cut downdown

Another way to reduce greenhouse gases is to Another way to reduce greenhouse gases is to use solar and wind energy which do not use solar and wind energy which do not produce these gases. produce these gases.

https://www.youtube.com/watch?v=-https://www.youtube.com/watch?v=-RMD88DNaGk RMD88DNaGk