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science
| Term | Definition |
|---|---|
| soot | a form of carbon, which is produced as very fine particles when hydrocarbon fuels undergo incomplete combustion |
| acid rain | rainwater that is more acidic than usual due to air pollution usually caused by sulfur dioxide and nitrogen oxide dissolved in it |
| catalytic converter | a device fitted to the exhaust of a vehicle to change harmful pollutant gases to less harmful ones |
| nitrogen oxide | acidic gas formed when nitrogen reacts with oxygen at high temperatures , such as in a car engine.(there are different types) |
| pollutant | a substance that can harm the environment or organisms that live there |
| sulfur dioxide | an acidic gas released from burning fossil fuels, which contributes to acid rain |
| incomplete combustion | combustion that produces a mixture of carbon dioxide, carbon monoxide, carbon and water and produces less energy.it occurs because there is not enough oxygen for all the reactants to be fully oxidised |
| acidic gases are removed from the chimney smoke of factories and power stations by | discs of calcium dioxide |
| nitrogen oxides are made... | in car engines |
| sulfur dioxide is produced when.. | burning coal |
| light travels as a ...... ....... | tranverse wave |
| light does/nt require particles to travel | doesnt |
| light travels slow/fast ....... m/s | fast ,300 million |
| true/ false, light travels in straight lines | true |
| transmitted | allowed to pass through |
| transparent | light passes |
| translucent | light passes but is scattered |
| opaque | no light passes through or absorbed and converted to thermal energy |
| how can u tell if u have specular refletion | a perfect reflection is shown |
| how can u tell the difference compared to diffuse reflection | anything else u can see |
| law of reflection | angle of incident is always equal to the angle of reflection |
| what is 'the normal' | a dotted line in the middle separating the angle of incident and angle of reflection |
| light does what when passing from glass to air | bend away from the normal |
| light does what when passing from air to glass | bends towards the normal |
| iris | changes the size of the pupil |
| optic nerve | path in which electric signals go to the brain |
| cornea | protects the eye |
| pupil | a hole that allows light to enter |
| lens | changes the direction of light |
| retina | absorbs light, sends electrical messages to the brain |
| habitat | location in which an organism lives |
| colour of complete combustion flame | blue |
| colour of incomplete combustion flame | orange |
| complete combustion produces | carbon dioxide + water |
| incomplete combustion produces | carbon, carbon monoxide, carbon dioxide,water |
| incomplete combustion uses | limited oxygen |
| complete combustion uses | plenty oxygen |
| complete combustion creates | lots of heat |
| incomplete combustion creates | less heat |
| burning coal produces | sulfur dioxide |
| car engines produce | nitrogen oxide |
| a perfect reflection is shown | specular reflection |
| no reflection is shown/anything that you can see | diffuse reflection |
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