DCA Week 12 Review Nov 13, 2012.

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Presentation transcript:

DCA Week 12 Review Nov 13, 2012

Metals are before the stairs, Nonmetals are after the stairs.

Conduction Examples: Stirring hot tea with a metal spoon, the spoon then becomes hot, this is called conduction because it CONDUCTED heat.

Radiation Is heat transfer directly from the SUNLIGHT and FIRE. Examples: Car warmed by sunlight Person getting warm outside in the sunlight Warming hands near a fire place.

Heat Transfer Examples: Hot marble in cold water, outcome is: marble got cooler while water got warmer. Hot metal in cold water, outcome is: metal got cooler while water got warmer.

Potential & Kinetic Energy Potential: stored energy Kinetic: Energy in motion Examples: Potential: Bow and Arrow pulled back Pulling back a rubber band Roller coaster at the top before it starts Batteries have stored energy (potential) as you use the battery, the potential energy is decreasing. Kinetic: Ball being thrown Pouring out water Roller coaster in motion

Good Ways to Investigate Potential & Kinetic Energy Roller Coaster Lab Setting up a ramp with a log, ruler, book, wooden board, etc. Hills, mountains Water slide

Converting Energy: Chemical >>>>>>>>> Electrical>>>>>>>>>>>>>>> Light

Energy Transformation Water Generators convert: Mechanical Energy to ELECTRICAL ENERGY

This is used to transfer mechanical energy to electrical energy. Wind Turbine This is used to transfer mechanical energy to electrical energy. Pin Wheels are a good model, BUT: -They don’t produce electrical energy -They can break easily from the wind -Too small to catch wind to produce electricity

Potential & Kinetic Energy on a Roller Coaster Potential is the greatest here! Kinetic is the greatest here!

Density Density = Mass Volume