FORCES & ENERGY

5. This causes an object's speed to change while moving in its direction.
6. Energy cannot be created or __.
7. Force that acts in the opposite direction to an object moving through the air.
13. This is the unit of weight.
15. A force exerted/caused by a spring (or any elastic object) when stretched or compressed, and returning to its original form.
17. Energy produced by moving objects.
19. The pulling or pushing force of magnets.

1. The amount of substance in an object.
2. When different poles face each other they attract each other.
3. Makes us feel warm or help cook our food.
4. Energy stored or saved in something so that it can be used to do work later.
8. A form of energy which allows us to hear.
9. Also known as electricity.
10. __ is the ability to do work.
11. When the same poles face each other they do this.
12. The pulling force on all objects towards the ground.
14. This is measured by using weighing machines like Stepping Scales or Kitchen Scales.
16. force Caused by two surfaces rubbing against each other.
18. A form of energy that allows us to see things clearly, and can produce heat.