energy transfer in the atmosphere chapter 4 - section 2 pgs 99 - 102
TRANSCRIPT
Energy Transfer in the Atmosphere
Chapter 4 - Section 2Pgs 99 - 102
Energy from the SunEnergy from the SunMost of the EarthMost of the Earth’’s s energy comes from the energy comes from the sunsun
35% is reflected back 35% is reflected back into spaceinto space
15% is absorbed by the 15% is absorbed by the atmosphereatmosphere
50 % is absorbed by the 50 % is absorbed by the earthearth’’s surfaces surface
HeatHeat
energy that flows from an object with a higher temperature to an object with a lower temperature
HeatHeatHeat always moves from a warmer place to a cooler place.
Hot objects in a cooler room will cool to room temperature.
Cold objects in a warmer room will heat up to room temperature.
Question?Question?
If a cup of coffee and a red popsicle were left on the table in this room what would happen to them? Why?
AnswerAnswer
The cup of coffee will cool until it reaches room temperature. The popsicle will melt and then the liquid will warm to room temperature.
Heat TransferHeat TransferThe Earth is heated by energy from the sun
This heat is then transferred through the atmosphere by radiation, conduction or convection
RadiationRadiation energy transferred in the form of waves or rays
ConductionConduction The transfer of heat that occurs when molecules bump into each other
Energy transferred through direct contact
ConvectionConvection Transfer of heat by the flow of material
Convection circulates heat throughout the atmosphere
ExampleExample
The Water CycleThe Water CycleHydrosphere - all the waters on Earth
The constant cycling of water in the atmosphere and hydrosphere that plays an important role in determining weather patterns and climate types
The Water CycleThe Water Cycle Evaporation - change of matter from a liquid to a gas state
Condensation - change of matter from a gas to a liquid state
Precipitation - rain, snow, sleet or hail that falls to the ground
Transpiration - giving off of moisture through the surface of leaves or other plant parts
Groundwater- water that collects and flows under ground
Runoff- water that runs along the surface of land into a body of water
The Water CycleThe Water Cycle
Adding or subtracting heat keeps the cycle Adding or subtracting heat keeps the cycle goinggoing