GCSE Energy and Fuels-Physics

Simple bullet points that covers various titles in the Energy and Fuels section for Physics. Gcse level.

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  • Created on: 25-01-11 10:40
Preview of GCSE Energy and Fuels-Physics

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Science Revision
Friday 12th June
Physics 2, Biology 2, Chemistry 2
Physics 2
Energy and fuels
Transformers and Grid
A step up transformer has more turns on secondary side,
which increases the voltage, and decreases the current
This reduces the energy loss
Nuclear Power
Advantages of nuclear power; it doesn't add to global
Advantage- energy is concentrated.
Disadvantages- the waste is dangerous
And nuclear power isn't renewable
Types of Nuclear Radiation
Alpha radiation is stopped by paper- used for smoke detectors
Beta radiation is stopped by aluminium- thickness
Gamma radiation is stopped by lead- detecting cancer, and
sterilising hospital equipment
Background radiation is natural radiation which is all around
us, and mainly comes from the stars and soil
Handling Sources
Keep them stored in lead containers
Use tongs when handling them
Never point the sources at anyone
Put away as soon as possible

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Panels are made of two layers of silicon
Electrons in the silicon absorb the suns energy
They break free of their atoms
They flow to make a current
Advnatages- can be used where there's no mains electricity
Disadvantages- can't be used at night
Solar Heating
The suns heat is absorbed by pipes
The heat is passed to water in the pipes
The heated water is pumped into the house
Passive Heating
Heat enters a house through windows.…read more

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Space Section
Cosmic Rays
Cosmic rays are ions from the sun
Which spiral around the Earths magnetic field, and get
deflected to the poles, to protect the Earth
A solar flare is a large cloud of fast moving charged particles
Which can damage satellites and power lines
Earth and Moon
A planet collided with the Earth
The iron cores merged to form the Earth
The less dense material formed the moon
The evidence for this is rocks from the moon and the Earth
are similar.…read more

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Hydrogen fuels run out
The star cools and expands into a red giant
Outer layers drift away to make a planetary nebula
The star shrinks to make a white dwarf
Death of Heavy star
Hydrogen fuel runs out
Star cools and expands into a red super giant
A black hole or neutron star remains
Star explodes a supernova
Big Bang Theory
All other galaxies are moving away from us
We know this because light from them has a longer wave
length (red shift)
The further…read more

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Low level is buried (but it may leak into the environment)
High level waste is sealed in glass
Problems with nuclear waste- terrorists may pinch it
Solar Flares
Solar flares are a burst of ions, they produce the northern
lights at the poles, they can damage satellites and power lines…read more

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