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Natural Resources

Across
Renewable energy derived from burning organic materials such as wood and alcohol.
A natural resource that can be used and replaced over a relatively short time
Careful use of resources to reduce damage to the environment though such methods as composting and recycling materials.
Energy as solar, wind, or nuclear energy that can replace traditional fossil fuel sources, such as coal, oil, and natural gas.
Nonrenewable energy resource, such as oil and coal, formed over millions of years from the remains of dead plants and other organisms.
A natural resource that cannot be replaced or that can be replaced only over thousands or millions of years.
Fossil fuel formed from marine organisms that is often found in tilted or folded rock layers and is used for cooking and heating.
Down
Any material made naturally that is used by humans or living things.
A resource that remains in constant supply and will not run out.
Electricity produced by water-power using large dams in a river.
Alternative energy source that is based on atomic fission.
Inexhaustible energy resource that used hot magma or hot, dry rocks from below Earth’s surface to generate electricity.
Energy from the Sun that is clean, inexhaustible, and can be transformed into electricity by solar cells.
Conservation method in which old materials are processed to make new ones.