science 4th, unit 7
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Science 4th, unit 7
El Tomillar, J.C. Brazo 1
Feb, 2014
Science 4th grade
UNIT 7
ENERGY AND
THE ENVIRONMENT
J. Cesar Brazo Mur
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Science 4th, unit 7
El Tomillar, J.C. Brazo 2
Feb, 2014
ENERGY has always existed
We can find energy all around us
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Science 4th, unit 7
El Tomillar, J.C. Brazo 3
Feb, 2014
ENERGY cannot be created or destroyed. It can only be TRANSFORMED INTO OTHER TYPES OF ENERGY
Examples
Electrical energy Sound energyor light
Chemical energy Heat and motion
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Science 4th, unit 7
El Tomillar, J.C. Brazo 4
Feb, 2014
SOURCES OFENERGY
Renewable Non-renewable
Do they pollute?
Can be replaced?yes
no yes
no
Main ones Main onesSolar energy
Hydropower
Wind energy
Geothermal energy
Biomass
Nuclear energy
Fossil fuels- Coal- Oil- Natural gas