Living for the Future
- Created by: Meep7375
- Created on: 02-06-15 19:30
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- Living for the Future
- Energy from the sun
- Almost all energy on earth comes from the sun
- Wind turbines generate electricity from the movement of air caused by the heating effect of the sun
- Electricity from solar cells is generated when sunlight creates a chemical reaction resulting in power
- Human energy comes form food, which is either from animals which eat vegetation or from vegetation, which grows through photosynthesis
- Wind turbines generate electricity from the movement of air caused by the heating effect of the sun
- Almost all energy on earth comes from the sun
- Generating Electricity
- Starts with the dynamo effect - a magnet moving through a coil of wire, inducing a flow of electric current
- The AC generator - using the dynamo effect but rotating the coil in a circular magnetic field inducing electricity to flow
- Power Station uses chemical energy to heat water to provide super-heated steam to turn turbines moving a magnet in a coil generating electricity to flow
- Global Warming
- Causes and effects; temperature change - environmental results
- Rising sea levels, expanding deserts, more extreme weather (worse, more often, for longer)
- Causes and effects; temperature change - environmental results
- Power and paying for electricity
- Power = current x voltage (measured in Watts)
- Energy transferred = power x time (measured in kWh - kiloWatt hours)
- Cost = energy transferred x unit cost
- Energy transferred = power x time (measured in kWh - kiloWatt hours)
- Power = current x voltage (measured in Watts)
- Fossil fuels and biomass
- Sources of biomass and fossil fuels
- Comparison of benefits and drawbacks
- Sustainability, environmental effects (damage caused by obtaining and using + wastage
- Comparison of benefits and drawbacks
- Sources of biomass and fossil fuels
- Nuclear Power
- Splitting the atom yields huge amounts of energy
- Energy is clean as it produces no carbon dioxide nor does it burn fossil fuels
- The reaction is controlled using boron and the nuclear rods are cooled in water
- Splitting the atom yields huge amounts of energy
- Radioactivity
- Particles which come out form an atom's nucleus are called radiation or radioactivity
- These collide with other atoms and molecules, sometimes removing electrons, thus creating ions - this is ionising radiation
- What is radiation? Three types of radiation (alpha, beta & gamma - need to explain the differences)
- Travel of & stopping radiation; uses for and safe use of radioactivity (e.g. X-rays, microwave ovens)
- What is radiation? Three types of radiation (alpha, beta & gamma - need to explain the differences)
- These collide with other atoms and molecules, sometimes removing electrons, thus creating ions - this is ionising radiation
- Particles which come out form an atom's nucleus are called radiation or radioactivity
- The Solar System
- Planets in order closest to Sun first: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune (Pluto became a dwarf in 2006)
- Universe keywords; asteroids and comets; asteroid impact
- Background cosmic radiation; The Doppler Effect; Solar flares
- Big Bang evidence; Birth & Death of a Star
- Background cosmic radiation; The Doppler Effect; Solar flares
- Universe keywords; asteroids and comets; asteroid impact
- Planets in order closest to Sun first: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune (Pluto became a dwarf in 2006)
- Energy from the sun
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