Date post: | 21-Jan-2015 |
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Education |
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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