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Energy and
Energy
Resources
Chapter 24
Sections 1, 2 and 3
Section 1: What is Energy?
Energy:
is the ability to
do work.
There are two types:
Kinetic Energy and
Potential Energy.
Kinetic Energy:
Kinetic Energy is energy
from motion.
Increases as an object
moves faster.
Increases as mass of an
object increases.

Potential Energy:
Energy
stored in an
object due to its position.
Energy comes in different
forms…….
 Energy
that increases as temperature
increases is thermal energy.
 Chemical energy – energy stored in
chemical bonds.
 Radiant Energy- light energy
 Energy from electricity is electrical energy.
 The nucleus of an atom contains nuclear
energy.
How does
Kinetic Energy
and Potential
Energy differ?
Section 2: Energy Transformations
 Energy
is constantly changing from one
form to another.
 Law of Conservation of Energy- Energy is
never created or destroyed; it merely
changes form.
 Energy can be transferred from kinetic to
potential energy and back to kinetic.
Machines transform energy
from one form to another.
 Chemical
energy can be transferred to
kinetic, radiant, thermal, or electrical
energy.
 Electrical energy can be transformed to
kinetic, chemical, electrical, or thermal
energy.
 Unlike other forms of energy, thermal
energy is not easy to store.
Turbines:
the kinetic energy is
converted to electrical
energy by a generator
at a power plant.

What
form of energy
is the most difficult to
store?
Section 3: Sources of Energy
Energy
comes from
either the Sun or
from radioactive
atoms in the Earth.
Fossil Fuels:
 Include
oil, natural gas, and coal.
 Contain chemical energy from the
Sun’s radiant energy via
photosynthesis.
 Non-renewable resources such as
fossil fuels are used up faster then
they can be replaced.
Nuclear
energy comes
from the nuclei of
uranium atoms.
Hydroelectricity from
potential energy of
water is a renewable
resource.
Alternative Resources: of
Energy may be safer for people
and the Environment.
 Solar
energy - can be captured in thermal
collectors or photovoltaic collectors.
 Geothermal energy- thermal energy
contained in hot magma.
 Windmills- can generate electricity
without polluting the environment.
Conserving
energy
will help prevent
energy shortages
and allow fossil fuels
to last longer.
Why
is it important
to conserve energy?