| A | B |
|---|
| effort | The use of energy to do something |
| lever | A simple machine for lifting |
| fulcrum | The point on which a lever is supported |
| explosion | The act of bursting apart suddenly |
| force | To move, push, or drive by pressure |
| century | A period of 100 years |
| decade | A period of 10 years |
| fraction | A part or piece of a whole |
| friction | The rubbing of one object or surface against another |
| lubricant | A slippery substance, such as oil that reduces friction |
