Chapter 3 🏵 Flashcards
Problems with hydroelectricity
The reservoir could run dry
Which types of energy are unreliable?
Renewable resources as they depend on conditions
Problems with wind and wave electricity
Wind and waves could be calm
Problems with tidal energy
Height of tide varies
Problems with solar energy
No solar energy at night
What is used to provide a constant amount of electricity
Nuclear and coal fired power stations
What is used to meet extra electricity demand in winter?
Gas fired power stations
When are renewable resources used?
When demand is high and when the conditions are suitable
What is produced when fossil fuels are burnt?
Greenhouse gases like carbon dioxide
What causes acid rain?
Sulfur dioxide
Advantages to nuclear power
No greenhouse gases produced
More energy produced
Disadvantages of nuclear power
Radioactive waste has to be stored for years
Explosions
Advantages of renewable energy sources
Never run out
No greenhouse gases
No radioactive products
Disadvantages to renewable energy
still not able to meet the world demand Wind turbines make noise pollution Tidal and hydroelectricity affect wildlife Solar panels need to cover a large area Can be unreliable
Disadvantages to solar energy
Convert less than 10% of energy absorbed to electricity
Only produce small amounts of energy
Very expensive
Lots of them needed
How do solar heating panels work?
Use the sun’s energy to heat up water in panels
How does geothermal energy work?
The energy transferred from radioactive substances heats rocks and heats the earths surface
Water is pumped into the earth and gets turned into steam which powers a turbine
How does wind power work?
Force of wind turns blades, which powers a generator
How does wave power work?
A floating generator bobs up and down on the water. This motion turns the generator so it makes electricity
How does hydroelectric power work?
Water collected in a reservoir or in storage flows downhill and drives turbines that power generators at the bottom of the hill
How does tidal power work?
Traps water from high tide behind a barrage. This water flows through turbines to reach the sea , generating power
What is a biofuel?
A fuel taken from a living or dead organism
Advantages to biofuel?
Renewable Carbon neutral (organism takes in as much carbon as burning expels)
How to get nuclear fuel?
Takes energy from atoms when they split (fusion)
What is a biofuel?
A fuel taken from a living or dead organism
Advantages to biofuel?
Renewable Carbon neutral (organism takes in as much carbon as burning expels)
How to get nuclear fuel?
Takes energy from atoms (fission and fusion)
What are the three non renewable types of energy
Coal
Oil
Natural gas
Alternatives to fuel powered cars
Bio fuels
Which power station has the longest start up time
Nuclear
What is released when fossil fuels are burnt
Greenhouse gases
What does sulcus dioxide do
Acid rain
What energy sources provides most electricity at the minute
Gas
What is the difference between solar heating panels and solar cell panels
Solar cell panels use sunlight to make electricity whereas the other uses it to heat water
Source of geothermal energy
Radioactive substances
Main disadvantage of geothermal energy
Few suitable areas and is expensive
Advantages of wind power 3
No pollution
No fuel cost and minimal running cost
No permanent damage to landscape
Advantage of geothermal power
Very little damage to environment
Advantage of solar cells 2
No pollution
Can be used in remote areas
Disadvantage to solar cells
Can’t get more power when needed
Advantage to nuclear power
Lots of energy created
What is the fuel in a nuclear power station
Uranium or plutonium
Advantage of tidal power 2
No pollution
Quite reliable
Disadvantage of tidal power 2
Spoils view
Destroys habitats
Advantage of wave power
No pollution
Disadvantage of wave power 2
Disturbing habitats
Unreliable
Advantage of hydro electric
Immediate response
Disadvantage of hydro electric
Big impact on environment
What is a renewable source of energy?
An energy source that is being replenished by natural processes as quickly as it is being used up
