Energy Resources
Nature of Energy•Energy is all around you!
–You can hear energy as sound.
–You can see energy as light.
–And you can feel it as wind.
You use energy when you:
-hit a softball.
-lift your book bag.-compress a spring
Living organisms need energy for
growth and movement.
Energy is involved when:
– a bird flies.
– a bomb explodes.
– rain falls from the sky.
– electricity flows in a wire.
What is Energy?
● Energy can be defined as the ability to do work.
● If an object or organism does work (exerts a force over a distance to move an object) the object or organism uses energy.
Energy Resources1. Fossil Fuels 5. Hydropower2. Nuclear Power 6. Solar Power3. Biomass 7. Wind Power4. Geothermal Power
Fossil Fuels
Coal, petroleum, and natural gas are fossil fuels.
They are nonrenewable because they cannot be
replenished in a short period of time.
Nuclear Energy
Nuclear fission uses uranium to create energy.
Nuclear energy is a nonrenewable resource because
once the uranium is used, it is gone!
BiomassEnergy from burning organic or
living matter Ex. burning wood, dung, sugar cane or
garbage.
Biomass energy is considered to be a renewable resource because it can be replenished in a short period of time.
Geothermal Power
Geothermal energy means getting heat from hot rocks within our Earth.
•A renewable resource
Geothermal Power
Hot water comes up out of the ground, and we use the heat to make steam to drive turbines and heat buildings.
Hydroelectric Power•Hydropower means getting energy
from flowing water.
•Perpetual
•No pollution, no fuel needed, no waste.
•Building a dam means flooding a lot of land.
WIND POWERA perpetual energy that ultimately comes
from the sun.
Wind doesn’t cause pollution, and doesn’t need fuel.
It needs a lot of generators to get a sensible amount of power.
Generators need to be placed where winds are reliable.
Solar Energy
•Solar power is perpetual.
•Solar power doesn’t cause
pollution and doesn’t need fuel.
•Solar cells are expensive.