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. 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

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

12. Density
Density = Mass
Volume