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ch.4 vg
| Question | Answer |
|---|---|
| Energy | ability to do work |
| Kinetic energy | the energy of motion |
| Potential energy | the energy an object has because of it position or shape |
| Relationship between potential & kinetic energy | when potential energy increases or decreases kinetic energy has to decrease or increase in order to form mechanical energy to remain constant |
| Kinetic energy formula | mv squared/2 |
| Potential energy formula | Weight times height |
| Mechanical | the total energy of motion and position of an object |
| Mechanical energy formula | potential energy+ kinetic energy |
| Law of conservation | Energy can be neither created nor destroyed |
| Thermal energy | Total energy of the particles that make up an object |
| Chemical energy | the energy of compound that changes as its atoms are rearranged to form new compounds |
| Electrical energy | the energy of moving electrons |
| Sound energy | caused by an object’s vibrations |
| Light energy | produced by the vibrations of electrically charged particles |
| Nuclear energy | the energy associated with changes in the nucleus of an atom |
| Non-renewable resources | can’t be replaced after they are used or can be replaced only over thousands or millions of years |
| Coal | heating, making of steel, industrial uses, coal exports, electric power |
| Petroleum | gasoline, kerosene, wax, petrochemicals, synthetic fiber, and rayon |
| Natural gas | heating systems, stoves, ovens, and alternative to gasoline, natural gas is the cleanest burning fossil fuel |
| Nuclear energy | radioactive |
| Renewable resources | can be used and replaced in nature over a relatively short period of time |
| Solar energy | converted into electrical energy through solar cells, converted to thermal energy |
| Hydro electrical energy | converted into kinetic energy and electrical energy |
| Wind energy | wind is caused by the suns uneven heating of the earth’s surface which creates currents of air |
| Geothermal energy | resulted from the heating of earth’s crust |
| Biomass | organic matter such as plants, wood, and waste that can be burned to release energy |
Created by:
vincent.gua
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