Term
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Definition
| Transfer light energy into electricity. |
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Term
| What are 3 advantages of using photocells? |
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Definition
No fuel is needed,
No power cables are needed,
They have a long life and are rugged - little maintenance is required. |
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Term
How is electricity generated
(The dynamo effect)? |
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Definition
| When a magnet inside a coil of wire moves into a magnetic field. |
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Term
| What are 3 ways to increase an induced current? |
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Definition
Move the magnet more quickly,
Use a stronger magnet,
increase the number of turns on the coil. |
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Term
| What are 2 renewable sources used for heat energy? |
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Definition
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Term
| What are the three types of nuclear radiation? |
|
Definition
|
|
Term
| How do you work out power? |
|
Definition
| Power (watt, W) = Voltage (volt, V) x Current ( ampere, A). |
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Term
| Where does nuclear radiation come from? |
|
Definition
| From the nucleus of an atom. |
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Term
| What are substances that give out radiation called? |
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Definition
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|
Term
| What are 2 uses of artificial satellites? |
|
Definition
| Telecommunications and weather predicting. |
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Term
|
Definition
| A large group of millions of stars. |
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Term
|
Definition
|
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Term
|
Definition
| Balls of ice and dust that orbit the sun. |
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Term
|
Definition
|
|
Term
| What do medium weight stars (the sun) change into? |
|
Definition
A red giant star,
A planetary nebula,
And finally a white dwarf star. |
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|
Term
| What do heavy weight stars change into? |
|
Definition
Red giant,
Supernova,
The central part forms a neutron star or black hole if heavy enough. |
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|
Term
| What is the big bang theory? |
|
Definition
| 13.6 billion years ago all the matter in the Universe was concentrated into a single incredibly tiny point. This began to enlarge rapidly in a hot explosion, and it is still expanding today. |
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Term
|
Definition
| Stars are formed from massive clouds of gas and dust in space. |
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Term
|
Definition
If something appears red
(eg. star or galaxy) it means it is moving away from us. |
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Term
|
Definition
If something appears blue
(e.g star or galaxy) it means it is moving towards us. |
|
|
Term
| What is passive solar heating? |
|
Definition
| When something is heated by absorbing the suns solar energy. |
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|
Term
| What does nuclear power use? |
|
Definition
| Uses Uranium as a fuel, It produces heat which makes steam to drive a turbine. |
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Term
| What is Alpha, Beta and Gamma used in? |
|
Definition
Alpha - Is used in smoke detectors.
Beta - Is used in tracers and thickness gauges.
Gamma - Is used in medicine for things such as sterillising equipment, and radiotherapy for cancer patients. |
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Term
| What causes the nothern lights? |
|
Definition
|
|
Term
| Which 2 planets is the ateroid belt between? |
|
Definition
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Term
|
Definition
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