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ENERGY TRANSFER I * Energy on our planet originates from the Sun http://www.youtube.com/watch?v=GRxAsKcoNYk
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ENERGY FROM THE SUN COMES IN MANY FORMS.
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LAW OF CONSERVATION OF ENERGY Energy cannot be created or destroyed, it just changes forms!
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RADIATION- DIRECT TRANSFER OF ENERGY IN THE FORM OF EM WAVES http://www.youtube.com/watch?v=m4t7gTmBK3g
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PARTS OF A WAVE http://www.youtube.com/watch?v=pMIdzILycTY
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MUCH OF THE ENERGY FROM THE SUN IS ABSORBED …
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SOME ENERGY FROM THE SUN IS REFLECTED IN OUR ATMOSPHERE
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SCATTERING- REFLECTION OF LIGHT IN ALL DIRECTIONS
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BECAUSE SHORTER WAVES ARE BLUE/VIOLET THEY ARE REFLECTED EASIER. LONGER WAVES REFLECT THE REDS/ORANGES. http://www.youtube.com/watch?v=x0996ts017U
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GREENHOUSE EFFECT- INFRARED ENERGY GETS TRAPPED WITHIN LAYERS OF THE ATMOSPHERE CAUSING AN INCREASE IN TEMPERATURE. http://www.youtube.com/watch?v=ZzCA60WnoMk
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ASSIGNMENT- EM SPECTRUM POSTER
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ENERGY TRANSFER II
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KINETIC THEORY OF MATTER Molecules are always in motion. As you add heat/energy to a system molecules move faster. Removing heat/energy to a system slows molecular movement.
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THERMAL ENERGY Total energy of motion in the molecules of a substance.
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TEMPERATURE Average amount of energy of motion of each molecule of a substance.
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THERMOMETER Thin, glass tube with a bulb on one end that contains a liquid. When the air temperature increases the liquid in the bulb expands. Cool air contracts the liquid or molecules in a thermometer. http://www.sciencechannel.com/tv-shows/how-its- made/videos/how-its-made-thermometers.htm
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DENSITY- Measure of the amount of atoms in a given area. The faster the atoms move and the farther apart they get the fewer there will be in the same area.
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PRESSURE- Measure of how many atoms are pushing on a given space. The fewer the atoms on a given space the lower the pressure.
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VOLUME- Amount of space that an object takes up. The farther apart the atoms are, the more space they take up.
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HEAT TRANSFER 1. Radiation 2. Conduction 3. Convection
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CONDUCTION Direct transfer of heat from one substance to another that is touching. *Solids conduct more effectively than liquids and gases.
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CONVECTION The transfer of heat by the movement of a fluid/gas. Hot air rises, cold air sinks.
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A QUICK REVIEW http://www.youtube.com/watch?v=2JZciWtK6vc
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HEAT/ENERGY AND EARTH SCIENCE http://www.youtube.com/watch?v=ajQ3hm5JidU
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FUSION- Process of hydrogen atoms combining to form helium atoms. As atoms collide energy is released. Eventually this process will end. External source of energy for the Earth.
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FISSION- The splitting of an atom’s nucleus into two smaller nuclei. Energy is released. Earth’s core (internal) source of energy.
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ENERGY AND ENERGY TRANSFER DRIVE THE EARTH’S SYSTEMS
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