Presentation on theme: "Layers of the Atmosphere SC 6-4.1 SC 6-4.7. Layers of the Atmosphere The atmosphere is the layer of gases that surrounds the planet and makes conditions."— Presentation transcript:
Atmospheric Temperatures In the Mesosphere: This is the COLDEST layer in the atmosphere. AltitudeTemperature
Atmospheric Temperatures In the thermosphere: Even though the air is thin in the thermosphere, it is very HOT. AltitudeTemperature
Atmospheric Temperatures Beyond the thermosphere is the exosphere which leads into outer space where it is very cold, because there is little to no atmosphere to absorb the Sun’s heat energy. AltitudeTemperature
Atmospheric Pressure Air pressure is the force exerted by the gases pushing on an object. Air pressure is greatest near the surface of the Earth in the troposphere. AltitudeAir Pressure
Solar Energy Energy from the Sun is known as Solar Energy. Solar energy is the driving energy source for heating Earth, and circulation in Earth’s atmosphere.
Solar Energy Some of the Sun’s energy coming through Earth’s atmosphere is reflected by gases and/or clouds in the atmosphere.
Solar Energy The land heats up and releases its heat fairly quickly. Water needs to absorb lots of solar energy to warm up. It is the water on Earth that helps to regulate the temperature range of Earth’s atmosphere.
Solar Energy Solar energy that is absorbed by Earth’s land and water surfaces is changed to heat that moves/radiates back into the atmosphere (troposphere) where the heat cannot be transmitted through the atmosphere so it is trapped, a process known as the greenhouse effect.
Atmospheric Heating Notes Radiation - the transfer of energy as electromagnetic waves Earth receives energy from the sun by radiation Earth receives about two-billionths of the sun’s energy 70% of the sun’s energy that reaches it is absorbed by the Earth’s surface, atmospheric gases and clouds Example: light bulb warming a lampshade
Thermal Conduction Thermal conduction is transfer of energy as heat through material.Thermal conduction is transfer of energy as heat through material. Thermal energy always transferred from warm to cold areas For conduction to take place contact/touch must take place Example: hot end of spoon sticking out of a pot of soup
Convection Convection - the transfer of thermal energy by the circulation or movement of a liquid or gas Most thermal energy in our atmosphere is transferred by convection Convection is the result of differences in density Example: boiling a pot of water or turning on the heat in the car
Greenhouse Effect The warming of the surface and the lower atmosphere of Earth that occurs when water vapor, carbon dioxide, and other gases absorb and reradiate thermal energy. Atmospheric gases function like the glass walls and roof of a greenhouse, which allow solar energy to enter but prevent thermal energy from escaping
Global Warming - Gradual increase in average global temperature Many scientists have hypothesized that an increase of greenhouse gases (especially carbon dioxide) may be the cause of the Earth’s warming trend
Questions: 1.How do differences in air density cause convection currents? 2.Name three ways energy is transferred in atmosphere. 3.How does process of convection rely on radiation?