Activities

1. Which of these items has energy?
   1. A moving motorcycle
   2. A running man
   3. A molecule
   4. All of the above

2. A burning candle emits energy mainly in two forms. What are the two forms of energy?
   1. Heat and light
   2. Heat and electrical
   3. Potential and light
   4. Light and kinetic

3. Complete the chart to show the forms of energy involved in the listed items.

4. Compare renewable and nonrenewable energy sources and give two examples of each.

5. Your assignment is to create a demonstration of mechanical energy. The only materials that you have are 100 dominoes. Explain how you will accomplish this task and describe at what point mechanical energy is observed.
   
   
6. Explain how "Energy cannot be created nor destroyed in any chemical reaction. It can only be changed from one form to another." Support your answer with at least two examples.

Answer Key/Rubric

1. D.
   
   
2. A.
   
   
3. Answers should resemble:

4. Acceptable responses might include, but not be limited to:
   • Renewable energy sources can be replenished naturally. Examples would be replanting trees after logging, biomass, and wind, sunlight, and water power.
   • Nonrenewable energy sources cannot be replenished quickly in a short period of time. Examples would be uranium, crude oil, natural gas, and coal.

5. Acceptable responses might include, but not be limited to:
   • First, the 100 dominoes are placed upright in a row. Then first domino is gentle pushed by my index finger which causes the other 99 dominoes to fall over one after another. The domino at the end of the chain falls over because of mechanical energy.

6. Energy is not created or destroyed instead it transforms from one form to another. For example as a candle burns it gives off light and heat which are both forms of energy. Another example is the chemical energy in a flashlight battery creates electrical energy which in turn creates light.