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Definition
A device that converts energy from one type into other useful types.
A TV converts electrical energy into light, heat and sound energy. |
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| The birth of our universe supported by evdence from red shift (light) and Cosmic Microwave Background radiation |
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| Dead organisms and rubbish |
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| The amount of carbon dioxide emitted when you burn plants is equal to the amount of carbon dioxide the plants absorbed. |
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| A greenhouse gas which causes global warming |
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| how heat travels through solids. Particles collide passing thermal energy along |
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| A material which allows heat to move through it easily. Metals are very good conductors. |
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| Hot liquids and gases rise carrying heat from hot to cold place. The hot fluid rises because it is less dense. |
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| A material which does not allow heat to flow quickly through it. Trapped air is an excellent insulator. |
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| Cosmic background microwave radiation |
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| Radiation hich is coming at us from all directions. The remnants of the big bang. |
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| The spreading out of waves |
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| The change in wavelength of a wave caused by the object moving towards or away from the observer. |
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| a description of how much energy is converted into useful energy by a machine |
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| A device which turns kinetic energy into electrical energy. |
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| A group of waves that all travel at 300 million m/s and are transverse. They are radiowaves, microwaves, infra red, visible light, ultra violet, x rays and gamma rays |
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| the number of waves that move through a point in one second. Measured in hertz. |
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| the distance from the middle to the top of a wave. Amplitude describes the energy of a wave. |
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| What we need if we want something to happen. Measured in joules. |
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| Electrons which ahve escaped the atoms in a metal and can carry heat through the metal quickly. |
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| A power station that uses hot radioactive rocks to turn water int steam which is used make electricity. |
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| Gradual increase in the temperature of the Earth due to the effects of mankind |
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| A gas like methane or carbon dioxide which stops heat escaping from the Earth, |
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| Hydroelectric power station |
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Definition
| Moving water from behind a dam is used to make electricity. |
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| Heat waves emitted by an object. |
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| a unit of energy we use for paying for electricity |
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| Energycannot be made or destroyed. It can only be converted from one type to another. |
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| A wave which causes vibrations in the particels in the same direction as it move. |
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| An electromagnetic wave used to send siganls and cook food. |
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| Web of cables across the country used to transport electricity |
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| Uranium or Plutonium are used to make electricity |
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| how long it takes to save the mney to pay for an energy saving device |
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| Amount of energy converted every second. Measured in watts |
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| An electromagnetic wave used to communicate. Bounces off the the earths ionospere. |
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| A wave bounces off a surface. |
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| A device whch turns light into electricity |
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| Amount of energy needed to raise the temperature of a substance by 1 degrees |
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| Machine which makes the voltage bigger |
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| Machine which makes the voltage smaller |
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