Bell work: Name as many forms of energy as you can.

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Bell work Name as many forms of energy as you
can.
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Energy Transformation
Partnership for Environmental Education and Rural
Health peer.tamu.edu
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Objectives

• Learn about the different sources energy
• Understand how one form of energy is transformed
  into another form
• Describe the difference between renewable energy,
  non-renewable energy and inexhaustible energy

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Energy

• Energy is the ability to do work.
• We use energy for transportation, to heat and
  cool our homes, to power our electronic devices
  and many other things.

CH-113.0
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Energy

• Law of Conservation of Energy - Energy is neither
  created nor destroyed it only changes forms.

This field has devices designed to generate
electricity from lightning by harvesting the
energy from the electrical discharge produced
from lightning.
CH-113.0
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Energy Transformation

• Energy transformation is the process of changing
  one form of energy into another.

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Energy Transformation
Biomass in the form of wood Energy from
the sun is absorbed by trees and plants and
stored as chemical energy through a process
called photosynthesis. When wood from trees is
burned, heat and light energy are released as
those chemical bonds are broken. Biomass is the
total quantity or weight of organisms in a given
area.
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Energy Transformation
Biomass in the form of dung Energy from the sun
is stored by plants via photosynthesis. The
plants are either eaten by humans, or they are
eaten by animals and dung is produced. Dung can
be burned to release heat and some light energy.
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Energy Transformation
Fossil fuels (coal, oil and natural gas) Energy
from the sun is stored by plants as chemical
energy via photosynthesis. Plants are eaten by
animals. Dead plants and animals gradually rot
and, over millions of years, are compressed to
make fossil fuels. Fossil fuels are burned,
creating heat and light energy plus emissions.
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Energy Transformation
Wind power Energy from the sun heats the
atmosphere, causing winds. The wind turns the
turbines on windmills, which generate
electricity.
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Energy Transformation
Wave energy Energy from the sun heats
the atmosphere, causing winds and therefore
waves. The waves drive turbines, which generate
electricity.
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Energy Transformation
Solar power Energy from the sun is collected
and stored in photovoltaic cells to be used as
electricity. Alternately, flat-plate solar
thermal collectors can be used to store the sun's
heat energy, which can be used directly, or to
heat water to make steam to drive a turbine to
generate electricity.
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Forms of Energy
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Forms of Energy
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Forms of Energy
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Forms of Energy
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Forms of Energy
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Forms of Energy
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Forms of Energy
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Forms of Energy

• The sun is the primary source of energy for most
  of the forms of energy that we use in our daily
  lives.
• However, there are other forms of energy that do
  not involve the sun.
• Geothermal
• Nuclear
• Hydroelectric (although the sun does power the
  water cycle that drives this form of energy)

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Geothermal Energy

• In volcanic areas, the rocks heat the ground
  water. It rises to the surface as hot water and
  steam.

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Geothermal Energy

• In some places, deep wells can be drilled down to
  the hot rocks and cold water is pumped down.
• The water runs through fractures in the rocks and
  is heated up.
• It returns to the surface as hot water and steam.

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Geothermal Energy

• In both cases, the hot water and steam are used
  to drive turbines which generate electricity.

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Nuclear Energy

• Nuclear fuels, like uranium, are the primary
  source of energy for nuclear power.
• These radioactive elements are involved in
  nuclear chain reactions in the reactor core,
  which produce large amounts of heat.    

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Nuclear Energy

• The heat energy is used to boil water.
• The kinetic energy in the expanding steam spins
  turbines, which then drive generators to produce
  electricity.  

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Hydroelectric Energy

• Hydroelectricity is electricity generated by
  hydropower, i.e., the production of power through
  use of the gravitational force of falling or
  flowing water.
• Most hydroelectric power comes from the potential
  energy of dammed water driving a water turbine
  and generator.

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Hydroelectric Energy

• It is the most widely used form of renewable
  energy.
• A hydroelectric plant produces no direct waste,
  and doesnt create as much of the greenhouse gas
  carbon dioxide (CO2) as fossil fuel powered
  energy plants.