a. Heat b. Light c. Mechanical d. Chemical e. Sound f. Electrical g. Gravitation 1. Falling rocks from the top of a mountain 2. Batteries 3. Clapping your hands 4. The energy that runs a refrigerator 5. Bowling ball 6. Rubbing your hands together 7. Gasoline 8. Flash light 9. Lightning 10. Boiling water on a stove 11. Lightened candle 12. Water flowing down a waterfall. 13. A whistle 14. Energy released from food after it is eaten. 15. The rumble of thunder from a storm