Warm Up – Page 44Suppose there were no sun, but we could still live on the Earth, what would it be like?

Brainstorm:On page 44, brainstorm a list of energy

sources with your partner.

Sort your energy sourcesProduced by the Sun (direct or indirect)

Not produced by the Sun

Where did you put the following energy sources?CoalOil Natural GasSolarWindHydroelectricGeothermalTidalNuclearBiomass

SolarEnergy from the sun.

WindWind is caused by the unequal heating of the

Earth. The Sun unequally heats the Earth, so wind energy relates to the sun.

Hydroelectric/WaterHydroelectric power comes from moving

water. Water moves throughout the planet because of the water cycle. The sun powers the water cycle, so water power is an indirect form of solar energy.

Coal, Oil, and Natural Gas (Fossil Fuels)Fossil fuels formed from the remains of

plants. Plants grow and make food through photosynthesis, which requires the sun. Without the sun, there would be no fossil fuels.

BiomassBiomass gets energy produces energy from

plants. Plants need the sun to survive. Another indirect form of solar energy.

Nuclear and GeothermalNuclear energy comes from the fission of

radioactive material. This material formed at the creation of the solar system.

Geothermal energy comes from the heat of Earth’s interior/core. This heat is produced by the breaking down of radioactive material.

TidalHarnessing energy from tide movements.Gravity from the moon (70%) and the sun

(30%)