Directions: Choose how heat energy transformed in the following materials. Write the letter of your answer on the blank before the number.

____1. solar panel and lamp
____2. Electricity and piano
____3. Lighted charcoal and kettle with water
____4. oven toaster and bread
____5. solar panel and calculator
____6. Food and human body
____7. Electricity and iron
____8. Matchstick and wood
____9. Dry cell and flashlight
____10. Gasoline and car engine

A. light energy - electrical energy - heat energy
B. heat energy - electrical energy - mechanical energy
C. electrical energy - heat energy
D. electrical energy - light energy - heat energy - chemical energy
E. chemical energy - electrical energy - heat energy - mechanicl energy
F. electrical energy - heat energy - sound energy
G. chemical energy - light energy - heat energy
H. chemical energy - light energy - heat energy - chemical energy
I. heat energy - sound energy
J. chemical energy - heat energy - mechanical energy​​