World energy sources


8.2.1 Identify different world energy sources.


. World Energy Source .

CO2 Emission (Y/N)

. Prime Energy Source .

Hydroelectric
No
Sun
Wind
No
Sun
Water Currents
No
Sun
Tidal Energy
No
Moon & Sun's Gravity
Solar
No
Sun
Bio Fuels
Yes
Sun
Fossil Fuels
Yes
Sun
Nuclear Fission
No
Nucleus
Geothermal
No
Energy in Earth's Core




8.2.2 Outline and distinguish between renewable and non-renewable energy sources.


Renewable energy sources cannot be used up or are replenished in a reasonable amount of time.

Non-renewable energy sources have a finite supply on Earth.


. Renewable .

. Non-renewable .

Solar
Fossil Fuels (Oil, Gasoline, Coal, Natural Gas)
Hydroelectric
Uranium (Nuclear)
Tides (Waves)

Wind

Geothermal

Biofuels






8.2.3 Define the energy density of a fuel.


Energy density is the amount of energy released per unit mass of fuel consumed.

density_eq.png

Energy density is measured in J / kg




8.2.4 Discuss how choice of fuel is influenced by its energy density.


Energy density determines the amount of fuel needed to produce a certain amount of energy.

The amount of fuel used affects

  • costs of purchasing / mining

  • costs of transporting and storing

  • costs of refining / enrichment

  • environmental impact



8.2.5 State the relative proportions of world use of the different energy sources that are available.


Only approximate values are needed
38 % Oil
24 % Coal
24 % Natural Gas
6 % Nuclear
4 % Biomass
3 % Hydroelectric
1 % Solar Heat, Wind, Geothermal, Solar PV combined

If you wish to see comparisons between 2007 and 2004 global energy source consumption, see website:
http://www.ren21.net/globalstatusreport/download/RE_GSR_2006_Update.pdf



8.2.6 Discuss the relative advantages and disadvantages of various energy sources.


This section has its own page. [Advantages and Disadvantages]