Energy resources

What is the difference renewable and non renewable energy?

↳ Renewable- can be replaced at the same rate as they are they used (infinite)

↳ Non-renewable- not replaced as quickly as they are they used (finite)

What are advantages of energy extracted from the ground (eg-coal,oil,natural gas)?

↳ Enough available to meet current energy demands

↳ Reliable (can be controlled)

↳ Relatively cheap to extract amd use

What are disadvantages of energy extracted from the ground (eg-coal,oil,natural gas)?

↳ Released carbon dioxide (worsen climate change)

↳ Release other pollutant gas (eg-sulfur dioxide) which causes acid rain

↳ Oil spills in ocean kil marine life

What is nuclear fission’s source?

↳ Mining naturally occuring elements (eg-uranium)

What are advantages of nuclear fission?

↳ No pollution gases

↳ Enough to meet demands

↳ Reliable

↳ Large amount of energy transferred from a very small mass of of fuel

What are disadvantages of nuclear fission?

Nuclear waste is

↳ Dangerous

↳ Difficult + expensive to remove

↳ Stored for centuries before being safe to dispose of

How is solar energy produced?

↳ Sunlight transfers energy to solar cells

What are advantages of solar energy ?

↳ Can be in remote places

↳ Very cheap to run once installed

What are disadvantages of solar energy?

↳ Supply depends on weathe

↳ Cannot supply large scalee demand

↳ Expensive to buy and install

How is hydroeletric energy produced?

↳ Water flows downhill turns generators

What are advantages of hydroeletric energy?

↳ Low running cost

↳ No fuel cost

↳ Reliable

What are disadvantages of hydroeletric energy?

↳ Destroys habitats

↳ Expensive to build hydroeletric dams

How is tidal energy produced?

↳ Barrages constructed across a river estuaries which turn turnines

What are advantages of tidal energy?

↳ Predictable supply

↳ Produces large amounts of energy

What are disadvantages of tidal energy?

↳ Supply varies on time of month

↳ Tidal barrages can harm animals

How is wave energy produced?

↳Waves force air into a chamber where it turns a turbine

What are advantages of wave energy?

↳ Low running cost

↳ No fuel cost

↳ No pollution

What are disadvantages of wave energy?

↳ Dependent on weather

↳ Cannot supply large scale demands

How is wind energy produced?

↳ Turbines are turned by wind to generate eletricty

What are advantages of wind energy?

↳ Low running cost

↳ No fuel cost

↳ No pollution

What are disadvantages of wind energy?

↳ Supply depends on weather

↳ Noise pollution

↳ Lots of land needed to produce electricity on a large scale demand

How is geothermal energy produced?

↳ Water heated underground when in contact with hot rocks creates steam to turn turbines and generate eletricity

What are advantages of geothermal energy?

↳ Low running cost

↳ No fuel cost

↳ No pollution

What are disadvantages of geothermal energy?

↳ Expensive to set up

↳ Only possible in certian areas

How is biofuels produced?

↳Fuel produced from living organisms

What are advantages of biofuels?

↳ Can be carbon neutral

↳ Reliable

What are disadvantages of biofuels?

↳ Expensive to produce biofuels

↳ Growing biofuels require lots of land and water (could be used for food)

↳ Can lead to deforestation