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Conservation

Across
A solid, nonliving material found in the ground
Is a rock that contains metal
Things found in nature that are useful to people
Is the upper layer of Earth's land surface
Is a natural resource that can not be replaced
Means processing used materials to make new products
Down
Is a natural resource that can be replaced
They formed from the remains of living things that died millions of years ago
Means using materials or products again
Is a solid, natural material made up of one or more materials
Is a material that can be burned to release energy
Means using less of a material for a certain purpose.