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.