CHAPTER 3 Flashcards
(48 cards)
Problems with hydroelectricity
The reservoir could run dry
Destroys animals habitats
What types of energy are unreliable
Renewable resources as they can 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 demands in winter
Gas fired power stations
When are renewable resources used
When demand is high and conditions are suitable
What is produced when fossil fuels are burnt
Greenhouse gases like carbon dioxide
What caused 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 year
Explosions
Advantages of renewable energy sources
Never run out
No greenhouse gases
No radioactive products
Disadvantages to renewable energy
Not able to meet world demand
Wind turbines make noise pollution
Tidal and hydroelectricity affect wildlife
Solar panels need to cover a large area
Disadvantages to solar energy
Convert less than 10% of energy absorbed to electricity
Only produce small amounts of energy
Very expensive
Lots needed
How do solar heating panels work
Use the subs energy to heat up water in panels
How does geothermal energy work
The energy transferred from radioactive substances heard ricks and heard the earths surface
Water is pumped into the earth and gets turned into steam which powers a turbine
How does wind power work
Forces of wind turn 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
Disadvantages to solar energy
Convert less than 10% of energy absorbed to electricity
Only produce small amounts of energy
Expensive
Lots of them needed
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
