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The six major forms of energy are:
1. Mechanical
2. Thermal
3. Chemical
4. Electrical
5. Electromagnetic
6. Nuclear
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Mechanical Energy
Energy associated with the motion and position of everyday
objects.
Examples
1. Speeding Train
2. Bouncing balls
3. Sprinting Athletes
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Thermal Energy
Total potential and kinetic energy all the microscopic particles in
an object
Examples
1. Friction
2. Boiling Water
3. Heating Pad
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Chemical Energy
Energy stored in the chemical bonds in compounds. When these
bonds are broken, the released energy can do work.
Examples
1. Fireworks
2. Burning Wood
3. Gasoline
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Electrical Energy
Energy associated with electrical charges.
Examples
1. Lightning Bolts
2. Television
3. Toaster
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Electromagnetic Energy
Energy that travels through space in the form of waves.
Examples
1. Visible Light
2. X-Rays
3. Tanning Beds (UV Light)
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Nuclear Energy
Energy stored in atomic nuclei
Examples
1. Nuclear Power Plant (Reactor)
2. Sun
3. Nuclear Weapons
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Two Laws of Energy
1. Energy Conversion
2. Law of Conservation
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1. Energy Conversion
Energy can be converted from one form to another
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Elastic Potential Energy is in the compressed spring.
When the spindle unwinds, elastic potential energy is converted
to kinetic energy of the toys moving parts.
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2. Law of Conservation
Energy can not be created or destroyed, it can only change form.
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Where does the kinetic energy of a bike go when you stop the bike?
• The bike slowed down and stopped because of friction.
• Friction changes the kinetic energy into thermal energy.
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Energy Conversion / Energy Conservation
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Draw a pendulum and show where potential energy is the highest,
and kinetic energy is the highest
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Draw a pendulum and show where potential energy is the highest,
and kinetic energy is the highest
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Where is the greatest PE and KE points on the following
pendulum?
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Quiz Time!!
#1) What type of energy cooks food
in a microwave oven?
Electromagnetic Energy
#2) What type of energy is the
spinning plate inside of a
microwave oven?
Mechanical Energy
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#3) Electrical energy is transported to your
house through power lines.
When you plug an electric fan to a power outlet,
electrical energy is transform into what type of
energy?
Mechanical Energy
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#4) What energy transformation occurs when an
electric lamp is turned on?
ELECTRICAL ENERGY
ELECTROMAGNETIC ENERGY
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#5) What 2 types of energy is shown below?
(Sort of a trick question……Think!!!)
•Mechanical
•Thermal Energy (Don’t forget friction)
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#6) What 4 types of energy is shown below?
•Electrical (power to TV)
•Mechanical (Push the button on the remote)
•Electromagnetic Energy (Infrared rays to TV from remote and the
light rays from the TV)
•Chemical (Batteries to the remote)
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#7) What type of energy is shown below?
Thermal Energy
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Question #1
Which of the following phrases describes a situation in which
potential energy is not changed into kinetic energy?
a. An apple falling from a tree
b. A dart being shot from a spring-loaded gun
c. The string of a bow being pulled back
d. A waterfall flowing over a cliff
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A car’s engines gears
Power Lines
Friction in the engine creating heat
Heating Soup
Moving Automobile
Nuclear Fusion (sun and stars)
Gasoline
Foods people eat
Mechanical
Electrical
Thermal
Thermal
Mechanical
Nuclear
Chemical
Chemical
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Nuclear Fission (Inside the earth’s core)
Lightning
Radio Waves
Melting Ice Cream
Leaping Frog
The car battery
Visible Light
Nuclear
Electrical
Electromagnetic
Thermal
Mechanical
Chemical
Electromagnetic
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As a group, find the five steps (four types of energy) that a match
uses to convert energy. Use a flow chart to describe
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1. You use chemical energy in your muscles to move your hand
(mechanical) and strike the match
2. Friction between the match and matchbox converts mechanical energy
into thermal energy
3. Thermal energy triggers a reaction in the match tip releases stored
chemical energy and lights the match
4. The stored chemical energy is converted into thermal energy
5. Thermal Energy to electromagnetic energy (flame waves)