Classify energy sources into nonrenewable and renewable categories.

Nonrenewable sources of energy are those that cannot be easily replenished or are consumed faster than they can be regenerated on a human time scale. Renewable sources of energy, on the other hand, are those that can be replenished naturally at the same rate as they are consumed or within a human lifespan.

Nonrenewable sources of energy include:

- Fossil fuels: Coal, natural gas, and oil/petroleum

- Nuclear energy: While uranium is abundant, the particular isotopes needed for nuclear fission are limited

Renewable sources of energy include: -

Solar energy: From the sun, using solar panels to convert light to electricity

- Wind energy: Using wind turbines to generate electricity

- Hydro energy: Using water flow in rivers or dams to generate electricity

- Geothermal energy: Harnessing the heat energy from within the Earth

- Biomass: Organic material from plants and animals that can be burned or converted to produce energy

- Tidal energy: Using the movement of tides to generate electricity