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Physical Science - Levels 3 - 6 - Answers
[ Questions ] |
| | A fuel is a substance that gives out heat when burnt. |
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Some power stations burn fuels to generate electricity. Name two fuels that are used in this way. coal/ oil/ gas/ wood
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Instead of burning fuels, some power stations use other sources of energy. Name three sources of energy that can be used to generate electricity but are not fuels. wind/ water/ solar/ nuclear/ geothermal
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Power stations that burn fuels can pollute the environment. Give two polluting substances produced in this way. sulphur dioxide or acid rain/ smoke/ dust/ ash/ carbon dioxide
The ray box has red lamps in it so that only red light is given out.
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Complete the path of the red ray using a ruler showing how it passes through the prism and onto the screen.
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The bulb is replaced with a clear glass lamp so that white light is given out. What would be seen on the screen now? a spectrum or a rainbow
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A blue filter (transparent plastic) is put between the screen and the prism so that the light coming out of the prism hits it. What would be seen on the screen now? only the blue light or a small section of the spectrum showing blue colours
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State why this change happens a blue filter only allows blue light to pass through / a blue filter only transmits blue light
A group in a science lesson was given 4 bulbs, two cells (batteries), a switch and plenty of wire.
First, they connected them as shown: 
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When the switch was closed the bulbs did light but not very brightly. What could they add to make the bulbs brighter? cells (batteries)
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All the bulbs are the same. Tick the correct statement for circuit 1.
The bulb nearest the batteries is the brightest.
All the bulbs are the same brightness.
The end bulb is the brightest.
Each bulb is dimmer than the one before.
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Their teacher gave the group 3 more switches and circuit diagram 2. 
When the group built and tested circuit 2, they found it had two main advantages over circuit 1. What are these advantages? bulbs brighter/ each bulb can be controlled individually/ if one bulb 'blows' the others still light
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What name is given to each type of circuit?
Circuit 1 is called a ___ series ____ circuit.
Circuit 2 is called a ___ parallel ___ circuit.
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Last modified on: Tuesday, June 9, 1998.
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