Unit 6 Part 1

Front 1

Fossil fuels

Back 1

fuels formed in the ground over millions of years from the remains of dead plants and animals; examples include petroleum, propane, natural gas, and coal.

Front 2

Nonrenewable

Back 2

sources of energy with a limited supply that can not be replenished in a short period

Front 3

Renewable

Back 3

energy that comes from sources that are constantly replenished by natural processes in a short period

Front 4

Inexhaustible energy

Back 4

energy that cannot be entirely consumed or used up; unlimited

Front 5

Coal

Back 5

A fossil formed from prehistoric plant remains, made mostly of carbon and burned as fuel.

Front 6

Petroleum

Back 6

A naturally occurring, nonrenewable fossil fuel formed from the remains of freshwater organisms and also called crude oil.

Front 7

Natural gas

Back 7

a colorless, combustible fossil fuel formed from the remains of marine organisms and made of methane gas.

Front 8

Propane

Back 8

a colorless, combustible fossil fuel found in natural gas and petroleum.

Front 9

Biomass-

Back 9

A renewable energy source that uses plant materials and animal waste as fuel.

Front 10

Compost-

Back 10

A mixture of rotting vegetation and manure; used as a fertilizer.

Front 11

Hydropower-

Back 11

a renewable energy source that converts falling or flowing water to electricity; employs the use ofa dam which controls the flow of a river.

Front 12

Tidal energy-

Back 12

a renewable, inexhaustible energy source that converts the energy of tides into electricity;employs the use of barrages and turbines as the tide rises and falls twice a day.

Front 13

Nuclear energy-

Back 13

a nonrenewable energy resource that comes from energy stored in the nucleus of atoms, usuallyUranium atoms, and is released in nuclear reactors to make electricity.

Front 14

Fission-

Back 14

the splitting of a nucleus into at least two other nuclei that releases a relatively large amount of energy;the process that occurs in nuclear reactors.

Front 15

Fusion-

Back 15

a nuclear reaction in which two or more nuclei combine together to form one larger nucleus; when thisoccurs, energy is released.

Front 16

Geothermal energy-

Back 16

a renewable energy resource that converts the heat naturally produced deep within theearth into electricity.

Front 17

Solar energy-

Back 17

a renewable, inexhaustible energy resource that converts energy given off by the sun intoelectricity; employs the use of photo-voltaic (PV) cells to collect energy.

Front 18

Wind energy-

Back 18

a renewable, inexhaustible energy resource that converts energy of moving air caused bytemperature and pressure differences to electricity; employs the use of wind turbines to collect energy.

Front 19

Greenhouse effect-

Back 19

the naturally occurring process in which gases in the atmosphere trap heat from the sun and keep the earth warm.