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Transcript

ENERGY

LET'S WATCH A VIDEO FIRST!

01 WHAT IS ENERGY?

Energy is present everywhere.

Energy is the ability of an object to transform itself or to produce changes in other objects.

02 ENERGY PROPIERTIES

Energy can neither be created nor destroyed, energy can only be transferred from one object to another.

03 Energy transformations

Chemical energy Electrical energy Light energy

Energy in the air --- transformed in electricity -- transformed in thermal energy to warm a room

04 FORMS OF ENERGY

Energy in the form of heat.

THERMAL ENERGY

Comes from the flow of electrical charge.

ELECTRICAL ENERGY

Energy in form of light.

LIGHT ENERGY

Energy that implies movement.

MECHANICAL ENERGY

04 FORMS OF ENERGY

Is found in substances like food and living things and also in batteries and fuel.

CHEMICAL ENERGY

Energy coming from the sun.

SOLAR ENERGY

Energy that comes from the wind.

EOLIC ENERGY

Energy caused by vibrations.

SOUND ENERGY

LET'S PRACTISE!

1

2

3

ACTIVITY

ACTIVITY

4

ACTIVITY

ACTIVITY

RENEWABLE ENERGY SOURCES

NON- RENEWABLE ENERGY SOURCES

Renewable Energy Sources

Renewable energy sources refers to energy sources present in nature: the sun, the wind, the force of water or the inner of the earth are examples of renewable energy sources.

They are present in nature and are naturally replenished that's why never run out.

Examples:

- Solar energy - Eolic energy
- Hydraulic energy _ Tidal wave energy
- Geothermal energy
(is generated form
the heat stored in the earth)

Non- renewable energy sources refers to limited energy on the planet that don't replenish naturally.

They are limited and that's why they may run out with use.

Non- renewable Energy sources

Examples:

- Coal - Oil
- Natural Gas - Nuclear Energy

Renewable or non-renewable?

Thanks for your attention!