1. Fuel Combustion Fossil Fuel Hydrocarbon Energy Transformation
A substance that provides energy as the result of a chemical change
Energy Transformation
A change from one form of energy to another
Combustion
The process of burning a fuel
Fossil Fuel
An energy rich substance ( such as coal, oil or natural gas) formed from the remains of organisms
Hydrocarbon
A energy rich compound that contains hydrogen and carbon atoms

2. Petroleum Refinery Petrochemical Solar Energy Hydroelectric Power
Liquid fossil fuel, oil
Refinery
A factory in which crude oil is heated and separated into fuels and other products
Petrochemical
A compound made from oil
Solar Energy
Energy from the Sun
Hydroelectric Power
Electricity produced using the energy of flowing water

3. Biomass fuel Gasohol Geothermal Energy Nucleus Nuclear Fission
Fuel made from living things
Gasohol
A mixture of gasoline and alcohol
Geothermal Energy
Heat from the Earth’s interior
Nucleus
The central core of an atom that contains protons and neutrons
Nuclear Fission
The splitting of an atom’s nucleus into two smaller nuclei and neutrons

4. Reactor Vessel Fuel Rod Control Rod Meltdown Nuclear Fusion
The part of a nuclear reactor where nuclear fission takes place
Fuel Rod
A uranium rod that undergoes fission in a nuclear reactor
Control Rod
A cadmium rod used in nuclear reactors to absorb neutrons from fission reactions
Meltdown
A dangerous condition in which fuel rods inside a nuclear reactor melts
Nuclear Fusion
The combining of two atomic nuclei to produce a single larger nucleus and much energy

5. Efficiency Insulation Energy Conservation
The percentage of energy that is used to perform work
Insulation
Material that blocks the transfer of heat between the air inside and outside of a building
Energy Conservation
The practice of reducing energy use