Energy (2)

What is energy? Where do we get energy?

Why is energy important?

Energy

HeatElectricalLightChemical

Energy comes in many forms:

HeatA form of energy

that makes things warmer.

Most heat on Earth comes from the sun.

ElectricityA form of energy

that can be used to make heat and light, and to power machines

ConductorAn object that lets

heat or electricity go through easily.

InsulatorAn object that does

not let heat or electricity go through easily

CircuitA path for an

electric currentOften shown in a

diagram with a battery, bulb, and wires

Open CircuitWhen the path of

electricity is broken and the light does not come on

Closed CircuitWhen the path of

electricity is complete and the light comes on

SwitchA device for

turning on or off electricity or an electric current

LightA form of energy

that lets you see things-

Example: color

AbsorbTo take something

inExample: colors

can be absorbed or reflected

Energy stored in thingsFor example: Batteries and food

Chemical

FoodSunWindBiomassHydro

Sources 0f Energy

Renewable

Sun Wind

Biomass Hydro

Fossil Fuels Oil

Coal

Renewable vs. Non-renewable Non-

renewable

Biomass is organic material made from plants and animals (microorganisms).

Biomass contains stored energy from the sun.

Biomass

BIOMASS

Fossil Fuels

Sources: http://www.vrml.k12.la.us/cc/vp_gle/3rd/homework/science/un2/science3un2.htm

http://www.eia.doe.gov/kids/energy.cfm?page=biomass_home-basics-k.cfm