Zusammenfassung der Ressource
P2 ocr gateway
- using the suns energy
- capturing the suns energy
with photocells
- photocells (solar
cells) generate
electricity directly
from sunlight
- they generate
DC (direct
current)
- made of silicon, the
atoms absorb some
of the energy,
knocking loos some
electrons, these then
flow round a circuit
- the current and
power output of a
photocell depends
on: surface area,
intensity of light,
the distance from
light source
- solar and wind power
- passive solar heating
- wind farms
- wind is a renewable source
- wind turbines are cheap
to run, no polluting
waste, renewable
- 1500 turbines replace 1 coal
fired power station, visual
pllution (ruin view), wind can
not be fast enough, blades
make noise (noise pollution),
impossible to increase suply
when demand, expensive to
set up, hard to find
somewhere
- power stations
- fuel, boiler,
steam,
turbine,
generator,
national grid
- fossil fuels
- biomass
- nuclear power
- photcells
- wind power
- electromagnetic
- the creating of a voltage and maybe current
in a wire which is experiencing a change in
magnetic field
- greenhouse effect
- carbon dioxide
- cars, fossil fuels,
chopping/burning trees
- Methane
- cattle,
volcanoes,
wetlands
- water vapour
- alpha, beta, gamma
- alpha particles are big and
heavy and are stopped by a
sheet of paper
- beta particles are
electrons, stopped by
aluminium
- gamma rays are very high frequency
electromagnetic waves, thick lead stops
gamma