2. KINETIC ENERGY
It is the energy of
movement and
motion.
The heavier and
faster and objets is
the more kinetic
energy it has.
3. POTENTIAL ENERGY
It is the energy
that is stored.
When it is
released, it
changes into
other form of
energy.
The coal changes
into light and heat.
Wood changes
into light and heat.
Stored water
changes into
electricity.
4. MECHANICAL ENERGY
It is a mixture
between kinetic
and potential
energy.
Example: a person and a
bike.
The bike is moving, so it is
kinetic energy. The energy of
person changes into the
force, so it is potential energy.
5. LIGHT ENERGY
Light sources
produce light.
Light sources can
be natural like the
Sun or stars or
artificial, like a
light bulb, torch,
etc.
6. CHEMICAL ENERGY
In chemical
energy a chemical
reaction occurs.
This reaction is
transformed into
another form of
energy.
Examples:
The energy of batteries
transforms into kinetic
energy.
The energy of food
transforms into kinetic
and thermal energy.
7. THERMAL ENERGY
It is the energy
that hot objects
produce.
The heat flows
from hot products
to cold products.
19. RENEWABLE AND NON-
RENEWABLE ENERGY SOURCES.
Renewable
sources will never
run out.
Non- renewable
energy sources will
run out sooner or
later.
20. SOLAR ENERGY
POSITIVE THINGS NEGATIVE THINGS
It is renewable and
does not pollute.
It only works in
sunny places.
21. WIND ENERGY
POSITIVE THINGS NEGATIVE THINGS
It is clean and
renewable.
Wind turbines
only work in
windy places.
Wind turbines
can kill birds.
22. It is renewable
and does not
pollute.
The construction
of dams
damages
habitats.
The construction
of dams causes
biodiversity loss.
WATER ENERGY
POSITIVE THINGS NEGATIVE THINGS
23. BIOMASS
First, biomass is burned.
Then, the fire heats the water.
Next, the water boils and produces water
vapor or steam.
Soon, the steam moves the
wind turbine.
Finally, the movement
produces electricity.
24.
25. GEOTHERMAL ENERGY
It is the energy which is produced inside the Earth.
Sometimes it reaches the surface as volcanoes
POSITIVE THINGS
It is
renewable.
It does not
pollute.
It is limited to
certain
geographical
areas.
NEGATIVE THINGS
26.
27. FOSSIL FUELS
Fossil fuels are coal and oil. They are
made of remains of animals and plants
that have been underground for
millions of years.
28. It is non-
renewable
It pollutes
a lot
It produces
global
warming
POSITIVE THINGS
COAL
It produces large
quantities of
energy.
NEGATIVE THINGS
29. It is non-
renewable.
It causes
ecological
disasters.
It is easy to
transport
and store.
OIL
POSITIVE THINGS NEGATIVE THINGS
30. What is uranium?
It is a radioactive mineral that people use in
nuclear power stations.
Nuclear power stations produce radioactive
waste.
Radioactive is harmful because it produces
cancer.