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DCA Week 12 Review

Dive into the world of energy with examples of conduction, radiation, heat transfer, potential and kinetic energy, and energy conversion. Learn about density, metals before nonmetals, and investigate energy on a roller coaster.

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DCA Week 12 Review

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  1. DCA Week 12 Review Nov 13, 2012

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

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

  4. 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.

  5. 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.

  6. 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

  7. 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

  8. Converting Energy: Chemical >>>>>>>>> Electrical>>>>>>>>>>>>>>> Light

  9. Energy Transformation Water Generators convert: Mechanical Energy to ELECTRICAL ENERGY

  10. 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

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

  12. Density • Density = Mass Volume

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