| A | B |
|---|
| closed system | does not exchange matter or energy with the environment |
| energy transfer | process of energy moving from one object to another without changing form |
| energy transformation | process in which one form of energy is converted to another form of energy |
| law of conservation of energy | states that energy can be transformed from one form to another, but it cannot be created or destroyed |
| open system | exchanges matter or energy with the environment |
| nonrenewable | available in limited amounts or is used faster than it can be replaced in nature |
| renewable | is replaced as fast as, or faster than, it is used |
| resource | stock or supply of materials, money, or other assets that can be used as needed |
| work | transfer of energy that occurs when a force makes an object move in the direction of the force while the force is acting on the object |
