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

Science 4th, unit 7

El Tomillar, J.C. Brazo 2

Feb, 2014

ENERGY has always existed

We can find energy all around us

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

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