Presentation about Energy. Natural Science 3º

1. ENERGY
J O S E A N T O N I O M A D R I D M A D R I D
C E I P M A N U E L A R O M E R O

2. Energy is the
capacity to
produce changes.

3. For example, thermal
energy is a form of energy
that produces changes, such
as changes of state.
Esta foto de Autor desconocido se concede bajo licencia de CC BY-SA-NC.

4. FORMS OF ENERGY
Esta foto de Autor desconocido se concede bajo licencia de CC BY-SA-NC.
Thermal
energy
Light energy
Electrical
energy
Mechanical
energy
Chemical
energy

5. Thermal energy
All substances have thermal energy. Heat is the transfer
of thermal energy.

6. Light energy
Light energy is
the energy found
in a light source,
like the Sun.

7. Light energy
Plants use the
energy from
sunlight to make
their food.

8. Chemical energy
Chemical energy
is the energy
stored in food,
fuels and
explosives.

9. Electrical energy
Electrical energy
is the energy
found in
lightning.
Esta foto de Autor desconocido se concede bajo licencia de CC BY-SA.

10. Electrical energy
It comes through
cables to our
homes.

11. Mechanical energy
Mechanical
energy is the
energy that an
object has
because of its
motion and its
position.

12. Mechanical energy
Sound also has
mechanical
energy.

13. Transformation of energy. Energy can
change from
one form of
energy to
another.
Esta foto de Autor desconocido se concede bajo licencia de CC BY.

14. Transformation of energy.
This happens
in many of
the
machines we
use.
Esta foto de Autor desconocido se concede bajo licencia de CC BY-SA-NC.
(electrical  thermal)

15. Transformation of energy.
Electrical
energy
transforms
easily into other
types.

16. Where does electrical
energy come from?
Electrical
energy is
produced at
power
stations.
Esta foto de Autor desconocido se concede bajo licencia de CC BY-SA.

17. Where does electrical
energy come from? Power stations
use different
sources of
energy, which
they transform
into electrical
energy.

18. Thermal power stations
Thermal power
stations burn fuels,
such as coal, petrol
and natural gas, to
produce electrical
energy.
Esta foto de Autor desconocido se concede bajo licencia de CC BY-SA.

19. Solar power stations
Solar power
stations use
light energy
and thermal
energy from
sunlight.

20. Hydroelectric power stations
Hydroelectric
power stations
use mechanical
energy from
water that falls
from reservoirs.

21. Wind power stations
Wind power
stations use
mechanical
energy from the
wind.

22. Air pollution When fuels burn
in thermal power
stations, they
produce
substances that
cause air
pollution.

23. Air pollution
One of these
substances is a
gas called
carbon
dioxide.
Esta foto de Autor desconocido se concede bajo licencia de CC BY-NC-ND.
carbon dioxide (CO2)

24. Global warming
This gas is the
main cause of
global warming.
Esta foto de Autor desconocido se concede bajo licencia de CC BY-NC.