AQA GCSE Science
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| What is a fuel ? | show | e.g. coal, wood, petrol
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| show | The Sun | All living things derive their energy from sunlight.
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| show | Coal, oil, natural gas. | These took millions of years to form underground.
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| Why are fossil fuels non-renewable ? | show | The process takes millions of years.
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| show | Wind, wave, tidal, solar, geothermal,hydroelectric. | These will never run out because they do not burn fuel.
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| show | They cause pollution and add carbon dioxide to the atmosphere. | They will run out someday and they also cause global warming.
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| Conduction happens only in . . . | Sokids, liquids and gases. | show 🗑
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| show | They contain de-localised electrons. | The electrons are free to move and transport energy throughout the metal.
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| Gases and most non-metals are . . . | show | because they have no 'free' electrons.
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| show | Thermal insulators. | They are chosen because they do not conduct well.
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| Convection usually happens in . . . | liquids and gases | show 🗑
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| show | convection current | Hot fluid is less dense so rises, transporting thermal energy.
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| Radiation is energy which is carried by . . . | show | There is no such thing as 'heat waves' in Physics.
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| show | electromagnetic radiation, mainly visible light. | The Sun also radiates UV, IR, radio and X-rays.
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| The Earth absorbs radiation from the Sun. This causes . . . | show | The temperature falls at night when energy is radiated back into space.
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| Every object emits . . . | show | The hotter it is the more radiation it emits.
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| show | TV remotes, thermal imaging cameras, security systems. | IR is invisible to our eyes, but a digital camera can see it; shine a TV remote at it.
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| show | thermometer with a blackened bulb to absorb the energy. | Black surfaces are good absorbers of radiation.
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| The electromagnetic spectrum consists of . . . | Radio, microwaves, infra-red, visible, ultra-violet, X-rays and gamma rays. | show 🗑
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| The Earth's atmosphere blocks which types of solar radiation? | show | It allows light and some infra red to reach the surface.
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| What is the 'Greenhouse Effect'? | show | The Earth is warmer because of the Greenhoue effect.
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| Which gases are 'Greehouse gases' ? | Water vapour, carbon dioxide and methane. | show 🗑
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| show | Polar ice is melting and sea levels are rising. | Low lying areas will be flooded.
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To hide a column, click on the column name.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
J Thomson
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