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Tech:Energy(3)
chapter three of the technology book
| Question | Answer |
|---|---|
| Energy | the ability to do work . can never be created or destroyed. gives the ability to do work; a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and systems |
| mechanical energy | energy that can be used directly to do work. the sum of potential energy and kinetic energy present in the components of a mechanical system |
| Potential Energy | Stored energy. Energy that is capable of doing useful work if it was released. . potential energy is the energy which is possessed by the virtue of its position |
| kinetic Energy | moving energy. the energy possessed by a body by the virtue of its motion or movement |
| Chemical Energy | the energy set free in a chemical reaction. It is a form of potential energy and results from the making and breaking of chemical bonds. |
| Electrical Energy | energy of moving electric particles; form of potential energy |
| Heat Energy | total kinetic energy of all the particles of a substance |
| Light Energy | energy given out by light sources; only form of energy that you can see directly |
| Sound Energy | energy present in a sound wave, vibrations of the air molecules |
| Renewable Energy | source of the energy is still there after the energy is taken from it. e.g.: wind, solar, hydroelectric |
| Non-Renewable Energy | source of the energy is gone after the energy is taken from it. e.g: nuclear energy, fossil fuels |
| The Sun, our star | Most energy originally comes from this |
| Work | Energy allows this to be done. i.e.: a forces through a distance |
| Electricity | convenient energy used at home |
| Watt | Unit of Power |
| Reservoir | Lots of water can be stored in this |
| Insulation | Reduces heat loss in a house |
| Nuclear Energy | Energy released by splitting atoms nucleus |
| Chemical Energy | type of energy stored in batteries |
| Potential energy | Energy with capacity to do work |
| Coal | a type of dark fossil fuel we burn |
| Motor | electrical energy changes to mechanical energy |
| Bulb | electrical energy changes to light and heat energy |
| Battery | chemical energy changes to electrical energy |
| Microphone | Sound energy changes to electrical energy |
| Speaker | electrical energy changes to sound energy |
| hair-dryer | electrical energy to heat, sound and kinetic energy |
| Bonfire | chemical energy to light, heat and sound energy |
| Dynamo | mechanical energy to electrical energy |
Created by:
murphyspooks
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