2. ENERGY
-It is the ability or power
to do work.
-Without Energy, all
processes on Earth
would stop.
3. 2 Types of Energy
1.Potential
Energy
2.Kinetic Energy
4. POTENTIAL ENERGY
- Objects that are not moving
have stored energy in them.
- This stored energy is called
POTENTIAL ENERGY.
- Objects with this kind of energy
will not move unless the stored
energy is set free or released.
5. An unstretched rubber
band exhibits potential
energy. Once the rubber
band is stretched, the
energy in it is released.
6. Examples of Potential Energy
1.A rock sitting at the edge of a cliff has
potential energy.
2.Tree branches high up in a tree have
potential energy because they can
fall to the ground.
3.A car that is parked at the top of a
hill.
4.A yoyo before it is released
5.A child at the top of a slide
7. KINETIC ENERGY
-It is the energy of motion
or energy of moving
objects.
-Any object that is
moving possesses
8. Examples of Kinetic Energy
1.An airplane in flight
2.A baseball thrown by a pitcher
3.An asteroid falling to earth
4.A car traveling down the road
5.A river flowing
6.An insect flying
9. Potential or Kinetic?
1.Water rushing downhill and
carrying away rocks.
2.Wind blowing and making
trees away.
3.A pencil on the table.
4.A rock about to fall on the
edge of a cliff.
10. Write PE if it is a Potential Energy and
KE if it is a Kinetic Energy.
1. Ball the ground
2. A stone on a hill
3. A rolling ball
4. A stretched sling shot
5. An airplane flying
12. • Mechanical Energy is the
energy that can produce
movements.
• It makes actions such as
pushing, pulling, drilling,
lifting, dropping, rolling,
and turning.
13. • An object that possesses mechanical
energy is able to do work.
• You can do some activities like
running, dancing and doing simple
exercises because your muscles
have mechanical energy.
• Wind is the source of mechanical
energy which enables the pinwheel to
move.
20. •The energy that results
during a chemical
reaction is called
chemical energy.
•It is a form of potential
energy.
• The energy is stored
21. •The energy is released
only when two or more
materials react with
each other to produce a
new material or change
to another energy.
22. Examples of Chemical Energy
• Dry cell / battery
• Fuels like coal, gasoline,
petroleum and firewood
• dynamites
• Grenades
• Medicine
• Foods
• Photosynthesis
23. USES OF CHEMICAL
ENERGY
1. Chemical energy is used
as fuel.
-gas, coal and other fuels are
used to run
machines,
motor and vehicles.
24. 2. Chemical Energy
sustains life.
-Glucose is the
product of
photosynthesis.
Plants make their
own food through
photosynthesis.
25. 3. Chemical Energy is used to
generate electricity.
-Chemical energy present in dry
cell or fuel can be used to
generate electricity.
Coal generate
electricity
in power plants.
