Get ready to be blown away by the wonders of energy! In my upcoming presentation, I will take you on an exciting journey through the various types and sources of this fundamental force. From the explosive power of nuclear fission to the clean and renewable energy of wind and solar power, we will explore the incredible range of technologies that harness the power of energy. Don't miss out on this opportunity to expand your knowledge and discover all that energy has to offer! By learning how to save energy, we can make a positive impact on our future. Let's explore ways to conserve energy so we can enjoy a sustainable world for generations to come.

1. Energy:
Forms and
Changes

2. Nature of Energy
• Energy is all around
you!
–You can hear
energy as sound.
–You can see
energy as light.
–And you can feel
it as wind.

3. Nature of Energy
• You use energy
when you:
–hit a softball.
–lift your bag.
–compress a
spring.

4. Nature of Energy

5. Nature of Energy
• Energy is involved when:
– a bird flies.
– a bomb explodes.
– rain falls from the sky.
– electricity flows in a
wire.

6. Nature of Energy
• What is energy that it can be
involved in so many different
activities?
– Energy can be defined as the ability
do work.
– If an object or organism does work
(exerts a force over a distance to
move an object) the object or
organism uses energy.

7. Nature of Energy
• Because of the direct connection
between energy and work, energy
is measured in the same unit as
work: joules (J).
• In addition to using energy to do
work, objects gain energy because
work is being done on them.

8. Two Basic Types of Energy
• Potential Energy
= the energy of
an object due to
its position,
shape, or
condition.
• Kinetic Energy =
the energy of an
object due to
the object’s
motion.

9. Gravitational Energy
The energy an
object or substance
has because of its
position; anything
“up high”
Potential Energy

10. Potential Energy
Nuclear Energy
Energy stored in the
nucleus of the atom
Holds the nucleus
together

11. Stored Mechanical
Energy
Energy stored in an
object by the application
of force
Must push or pull on an
object
Potential Energy

12. Chemical
Energy Energy
stored in the bonds
between atoms
Holds molecules
together
Potential Energy

13. Mechanical Energy
(Motion)
Movement of objects or
substances from one
place to another
Kinetic Energy

14. Electrical Energy
Movement of
electrons in one
direction
NOT AN ELECTRON
PARADE!
Kinetic Energy

15. Sound Energy
Movement of
energy through
substances in the
form of longitudinal
(compression)
waves
Kinetic Energy

16. Radiant Energy
Electromagnetic
energy that travels in
transverse waves
Kinetic Energy

17. Kinetic Energy
Thermal Energy
(a.k.a. Heat)
Internal energy of a
substance due to the
vibration of atoms and
molecules making up
the substance

18. Ball slows down Ball speeds up

19. The Law of Conservation of Energy
• Energy can be neither created nor
destroyed by ordinary means.
– It can only be converted from one form to
another.
– If energy seems to disappear, then scientists
look for it – leading to many important
discoveries.

20. What are energy resources?
An energy resource is anything that can be used to generate
power for human use. There are two categories of energy
resource:
10/23/2023 The NEED Project 20
non-renewable energy resources
will eventually run out – once used
they cannot be used again. Examples
are fossil fuels (coal, oil, natural gas)
and nuclear fuels (uranium,
plutonium).
renewable energy resources can be
replaced or regenerated and will never
run out. Examples are wind,
hydroelectricity and solar power.

21. RENEWABLE RESOURCES
Renewable resources are
natural resources that can
be replenished in a short
period of time.
● Solar ● Geothermal
● Wind ● Biomass
● Water or Hydropower

22. Disadvantages
• Solar panels are
expensive.
• When it is cloudy or at
night there is not enough
light.
• Some people don’t like
the look of solar panels.
What is it?
• Solar power
uses energy
from the
Sun.
• Solar panels
transfer the
Suns energy
to heat
water.
Advantages
• The energy from the Sun
is free.
• The sun does not produce
greenhouse gases.
• The sun will always be
there during our lifetime.

23. Disadvantages
• Solar cells are
expensive.
• They take up lots of
space.
• They only work in Sun
light
What is it?
• Solar cells
use energy
from the Sun.
• Solar panels
transfer the
Suns energy
directly into
electricity.
Advantages
• The energy from the Sun
is free.
• The sun does not produce
greenhouse gases.
• The sun will always be
there during our lifetime.

24. Disadvantages
• Inefficient (only 30%
efficiency).
• Releases harmful solid
carbon particles into
the atmosphere.
What is it?
• Biomass, is a
renewable
energy source
made of
biological
material from
living, or recently
living organisms.
• Energy is
released by
combustion
(burning).
Advantages
• Produces less
pollution than fossil
fuels.
• Does not cause acid
rain.
• Can be found locally.
• It is renewable.

25. Disadvantages
• Lots of wind turbines
are needed to
produce enough
power.
• Turbines can only be
put in windy areas.
• It is not always windy.
• Some people don’t
like the look of the
turbines.
What is it?
• Wind turbines
are used to
generate
electricity from
the wind.
• The wind turns
the large blades
and the blades
turn a generator.
Advantages
• Wind is renewable.
• Wind is free.
• No greenhouse gases are
made.
• There are few safety risks.

26. Disadvantages
• There are not many places
where we can build
geothermal power stations.
• Harmful gases and minerals
may occasionally come up
from the ground below.
These can be
• difficult to control.
What is it?
• Rocks under
the ground
are hot.
• Water can
be pumped
through
these hot
rocks and
warmed up.
Advantages
• Geothermal energy does
not produce greenhouse
gases.
• The energy source is free
and will not run out.

27. Disadvantages
• The dam is expensive to
build.
• By building a dam, the
nearby area has to be
flooded and this could affect
nearby habitats.
• If it does not rain much we
may not have enough water
to turn the turbines.
What is it?
• Flowing
water is
used to turn
a turbine
which
generates
electricity.
Advantages
• When the electricity is
generated, no greenhouse
gases are made.
• The water used is free.
• It is a renewable energy
source.

28. Disadvantages
• Small waves generate
small amounts of
electricity.
• Electricity needs to be
transported from the sea
onto the land.
• The equipment is
expensive
What is it?
• Waves force
air in and
out of a
chamber.
• The air
causes a
turbine to
generate
electricity.
Advantages
• Waves are free and will not
run out.
• Wave power does not
produce greenhouse gases.
• There are very few safety
risks.

29. Disadvantages
• A dam to make the water
flow through the
generators might be
needed.
• Plants and animals that live
nearby might get harmed
• The tides only happen
twice a day, so can only
produce electricity at that
time.
What is it?
• Solar power
uses energy
from the
Sun.
• Solar panels
transfer the
Suns energy
to heat
water.
Advantages
• Tides are free and will not run
out.
• No greenhouse gases are
produced.
• It is reliable because we know
exactly when the tides happen.

30. NONRENEWABLE RESOURCES
A nonrenewable resource is a natural
resource that cannot be re-made or re-
grown at a scale comparable to its
consumption.

31. Disadvantages
• Harmful radioactive
waste is created.
• Uranium supplies may
only last for another
50 years.
• Non-renewable
• Radiation may cause
cancer
What is it?
• Radiation is
released from
the nuclei of
metal atoms.
• The radiation
can be used
to generate
electricity.
Advantages
• Green House gases are
not made.
• Only a small amount of
fuel is needed to create
a lot of energy.

32. Coal, petroleum,
and natural gas are
considered
nonrenewable
because they can
not be replenished
in a short period of
time. These are
called fossil fuels.

33. HOW IS COAL MADE ???

34. HOW ARE OIL AND GAS MADE ???