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Science Review

Across
Electricity that is made from the natural heat inside the earth.
Hills formed by wind and blowing sediments
Carbon based fuel made from plants and poop also known as biomass.
Resources that can not be renewed in one lifetime.
A source of energy other than fossil fuels
The break down of rocks into smaller particles by wind ice and water.
A deep gorge in the surface of the earth formed by erosion and sand
Down
Resources that are always available like water, sun, wind, biofuels, and geothermal energy.
The build up of land that happens when it is taken from one place to another.
Energy that comes from moving water
Materials introduced into an atmosphere that make it dirty, unsafe and uncomfortable.
A triangular landform where a river empties into another body of water.
Energy that comes from the sun
Feature in the earth such as mountains, rivers, oceans, and sand dunes
Energy that comes from moving air
The gradual wearing down of something by wind rain, or other natural resources.