| A | B |
|---|
| Density | The weight per unit of volume of a substance. |
| Energy | The capacity for doing work. |
| Fossil Fuels | Natural gas, oil, and coal formed millions of years ago from dead plants and animals. |
| Gas | The vapor state of matter. |
| Horsepower | A unit equal to 33000 ft-lb of work per minute. |
| Liquid | A substance where molecules push outward and downward and seek a uniform level. |
| Magnetism | A force causing a magnetic field to attract ferrous metals, or where like poles of a magnet repel and unlike poles attract each other. |
| Mass | Matter held together to extent that is considered one body. |
| Matter | A substance that takes up space and has weight. |
| Power | The rate at which work is done. |
| Solid | Molecules of a solid are highly attracted to each other, forming a mass that exerts all of its weight downward. |
| Specific Gravity | The weight of a substance compared to the weight of an equal volume of water. |
| Specific Volume | The volume occupied by 1lb of a fluid. |
| Watt | A unit of power applied to electron flow. One watt equals 3.414 Btu. |
| Work | A force moving an object in the dirrection of the force. Work=Force x Distance |
