conservation of energy mrs. anna ward james martin ms
TRANSCRIPT
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Conservation of Energy
Mrs. Anna WardJames Martin MS
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Do Now!!!!Match the units
• Distance• Force• Acceleration• Speed• Time• Velocity• Mass
• kg• Newton or Kgm/s2• m• m/s2• S• m/s• m/s North
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Announcements
• Agenda for the week• Quiz on Thursday• Fruit Sale• “Orange Out” on Wednesday
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TYPES OF ENERGY
Mechanical, Electromagnetic,
Electrical, Chemical and Thermal
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What is Mechanical Energy?
o Energy due to a object’s motion
(kinetic) or position (potential).
The bowling ball has mechanical energy.
When the ball strikes the pins, mechanical energy is transferred
to the pins!
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Examples of Mechanical Energy
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What is ElectromagneticEnergy?
o Light energy
o Includes energy from gamma rays, xrays, ultraviolet rays, visible light,
infrared rays, microwave and
radio bands
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What is Electrical Energy?
o Energy caused by the movement of
electrons
o Easily transported
through power lines and converted into other forms of
energy
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What is Chemical Energy?
o Energy that is available for release from
chemical reactions.
The chemical bonds in a matchstick
store energy that is transformed into thermal energy
when the match is struck.
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Examples of Chemical Energy
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What is Thermal Energy?
o Heat energy
o The heat energy of an object determines how active its atoms are.
A hot object is one whose atoms and molecules are excited and show rapid
movement.
A cooler object's molecules and atoms will show less
movement.
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QUIZ TIME!What type of energy cooks food in a microwave oven?ELECTROMAGNETIC
ENERGY
What type of energy is the spinning plate inside of a microwave oven?MECHANICAL ENERGY
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QUIZ TIME!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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QUIZ TIME!
What energy transformation occurs
when an electric lamp is turned on?
ELECTRICAL ENERGY
ELECTROMAGNETIC (or LIGHT) ENERGY
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What types of energy are shown below?
Mechanical and Thermal Energy(Don’t forget friction)
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What type of energy is shown below?
Chemical Energy
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What types of energy are shown below?
Electrical, Mechanical andElectromagnetic Energy
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What type of energy is shown below?
Chemical Energy (yummy)
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What type of energy is shown below?
Thermal Energy
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• Draw a flow map showing the flow of energy transformations in a car from starting vehicle to driving. You should have 5 different types of energy.
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Energy Transfer
Chemical
Electrical
Electrical
Electrical
Sound(mechanical)
Light(Electromagnetic)
ThermalMechanical
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Types of Energy
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Independent Practice Examples: Conservation of Energy
• A tennis ball• Eating a plate of spaghetti• A burning fire• A bouncing ball• Tank of gasoline
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Independent Practice Time!!!
• Each group has an assigned statement.• Use what you have learned today to respond
to how you think this statement demonstrates the Law of Conservation of Energy
• We will rotate groups. You may agree (or disagree) with the other groups.
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Brain Pop!!!
• http://www.brainpop.com/science/energy/formsofenergy/preview.weml