Energy

3. materials that can be used to produce energy
4. turning natural resources into usable energy
5. property that leads to permanent changes in an objects shape
8. a force that pushes parts of an object in opposite directions
9. forces within an object including tension, compression, shear and torsion
12. powers the lights
14. force that squeezes
15. property that enables temporary change
16. force that opposes movement of an object when those objects make contact with other objects or surfaces

1. forces that act on an object from outside
2. force force exerted on any object that is in contact with a compressed or stretched elastic object or spring
6. the ability to do work
7. a force that twists an object
10. a force that pulls apart an object
11. a push or pull on an object
13. a force exerted on an object