Energy

3. A material that burns to release heat energy.
4. The force that is exerted on and between any objects with mass.
5. the weight being lifted by a simple machine
7. The difference in electrical pressure between two points in an electric circuit.
8. A form of energy that is transferred from hot to cold objects.
11. A form of energy that is transferred from hot to cold objects.
12. The force that resists motion between two surfaces sliding against each other.
13. Images used to represent something real, such as the letter I representing electric current.

1. The force of gravity acting on an object.
2. A large, rotating air depression bringing wind and rain.
6. The situation where radiation, such as light, bounces off a surface.
9. A device that converts stored chemical energy to electrical energy
10. A form of electromagnetic radiation that is visible.
13. Special organs and nerves used by animals to detect the environment around them. They include sight, smell, taste, hearing and touch.