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Science test 7.0
| Question | Answer |
|---|---|
| Energy | the ability to cause change |
| kinetic energy | energy due to motion |
| Potential energy | stored energy due to the interactions between objects or particles |
| work | the amount of energy used as a force moves an object over a distance |
| mechanical energy | sum of the potential energy and the kinetic energy in a system. |
| sound energy | energy carried by sound waves. |
| thermal energy | the sum of the kinetic energy and the potential energy of the particles that make up an object. |
| radiant energy | energy carried by an electromagnetic wave. |
| electric energy | energy carried by an electric current |
| nuclear energy | energy stored in and released from the nucleus of an atom |
| law of conservation of energy | law that states that energy can be transformed from one form to another, but it cannot be created or destroyed. |
| friction | a contact force that resists the sliding motion of two surfaces that are touching. |
| heat | the movement of thermal energy from a region of higher temperature to a region of lower temperature. |
| conduction | the transfer of thermal energy due to collisions between particles |
| thermal conductor | a material through which thermal energy flows quickly. |
| thermal insulator | a material through which thermal energy flows slowly |
| convection | the circulation of particles within a material caused by differences in thermal energy and density; the transfer of thermal energy by the movement of particles from one part of a material to another. |
| Radiation | the transfer of thermal energy by electromagnetic waves. |
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