| A | B |
|---|
| Convection | The transfer of energy due to density differences that are caused by temperature variations. |
| Conservation | To keep or save something from being used up. |
| Conduction | The transfer of energy through matter in which energy moves from one particle to another. |
| Heat | The transfer of energy between objects that are at different temperatures. |
| Specific Heat | The amount of energy needed to raise the temperature of a material one degree. |
| Work | The transfer of energy through motion. |
| Kinetic energy | Energy in the form of movement. |
| Radiation | The transfer of energy through electromagnetic waves. |
| Open system | A region separated from its surroundings by a boundary that admits a transfer of energy across it. |
| Renewable resource | A source of energy that can be replaced at the same rate as it is used. |
| Closed system | A region separated from its surroundings by a boundary that admits no transfer of energy across it. |
| Potential energy | Stored energy resulting from the relative positions of objects in a system. |
| Joules | The unit of measurement for energy and work. |
| Isolated system | A region separated from its surroundings by a boundary that cannot permit energy to enter or exit the system. |
| Mechanical system | A group of objects that interact using mechanical principles. |
| Fossil fuel | A nonrenewable source of energy formed from the remains of organisms that lived long ago. |
| Nonrenewable resource | A source of energy that is consumed faster than it forms and therefore cannot be replaced within a human life span. |
