Answer: Resources are characterized as renewable or nonrenewable
- a renewable resource can replenish itself at the rate it is used such as solar energy, wind energy, hydro energy, and tidal energy.
- a nonrenewable resource has a limited supply such as coal, gas, nuclear energy, and fossil fuels.
protons, neutrons, and electrons.
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Iron and steel are magnetic in nature. So you can use a magnet to separate them
The correct definition of density is the degree of compactness of a substance.