Science Unit 5

Energy Resources
Energy replaced continually within a human lifespan, has an essentially unlimited supply and is not depleted when used by people. Solar energy, hydroelectric, geothermal, fusion and wind, are the most widely used.
A resource that cannot be reused or replaced in a short period of time or at all; metals, minerals, petroleum, fossil fuels
Solar Energy
the energy received by Earth from the sun in the form of radiation
plant materials and animal waste used as fuel
Electricity produced by water power using large dams in a river.
Tidal Energy
Renewable energy that relies on the ebb and flow of the tides to generate electricity
Geothermal Energy
heat produced by natural underground sources
Wind Energy
energy created from the movement of air over Earth's surface when air pressure differences are caused by the sun's uneven heating of Earth's surface
fossil fuel in the form of a black or brown rock that developed from plants that died between one and four hundred million years ago
liquid fossil fuel formed from marine organisms that is burned to obtain energy and used in the manufacture of plastics
Natural Gas
fossil fuel formed from marine organisms that is often found in tilted or folded rock layers and is used for heating and cooking
the percentage of energy that is used to perform work
a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
a nuclear reaction in which nuclei combine to form more massive nuclei with the simultaneous release of energy
the preservation and careful management of the environment and of natural resources
Fossil Fuel
a nonrenewable energy resource formed from the remains of organisms that lived long ago
a mineral necessary to make nuclear power; considered nonrenewable
Energy Resource
a natural resource that can be converted by humans into other forms of energy in order to do useful work
Green House Effect
the natural heating process of a planet, such as Earth, by which gases in the atmosphere trap thermal energy.
Global Warming
Theory that the Earth is gradually warming as a result of an enhanced greenhouse effect in the Earth's atmosphere caused by ever-increasing amounts of carbon dioxide produced by various human activities.
capable of being broken down by living microorganisms and absorbed by the environment
The process of decomposition of organic materials, yard waste and food. It makes rich soil.
to put wastes, garbage, or the like, through a cycle of purification and conversion to useful products
harmful substances in the air, water, or soil, that can affect the health of humans and other living things.
the source of energy for most living things, as well as most energy resources