Full%20of%20Energy

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Full of Energy
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Vocabulary

• Chemical Energy
• Current
• Electrical Energy
• Energy
• Kinetic Energy

• Mechanical Energy
• Potential Energy
• Voltage

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What is ENERGY???

• Work is when an applied force cause a change in
  motion, heat, or light in another object
• A Bicyclist pedals of his bike and the bike moves
• A magnet pulls a piece of medal towards itself
• A log burns

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What is ENERGY???

• Energy is the ability to do work
• The bicyclist has energy which he uses to propel
  his bike
• The magnet and piece of metal, when held at a
  distance, the magnet has energy to move the metal
• The log has energy so that when burned it will
  emit heat and light

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What is ENERGY???

• There are two different forms of energy
• Kinetic Energy
• Potential Energy
• There are many different types
• Mechanical
• Chemical
• Electrical
• Etc.

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Potential vs. Kinetic Energy

• The energy stored in an object is called
  potential energy.
• The energy of motion is called kinetic energy.
• Both kinetic and potential energy are caused by a
  force.

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Transformation From Potential to Kinetic

• Potential energy can be transformed into kinetic
  energy.
• This is done by allowing an object or particle to
  move in the direction of a force. This will
  decrease the potential energy and increase the
  kinetic energy.
• Examples of this can be found in different forms
  of energy,
• Mechanical energy
• Chemical energy
• Electrical energy

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Mechanical Energy

• Mechanical energy is based on the position and
  movement of an object
• Mechanical energy can be created by different
  forces gravity, pressure, humans, etc.

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Mechanical Potential Energy

• Potential
• A ball being held has potential energy.
• The amount of energy is related to the height at
  which it is being held.
• The potential energy comes from gravity pulling
  on the ball.

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Mechanical Kinetic Energy

• Potential gt Kinetic
• When the ball is released it will begin to fall.
• This will decrease its distance from an origin
  point such as the ground, therefore decreasing
  its potential energy.
• The ball will move towards the ground at an
  increasing speed, therefore increasing kinetic
  energy.

Observation The higher the ball Is held, the
greater the potential energy.
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Chemical Energy

• Chemical energy is based on the bonds between
  atoms.
• Chemical energy is released when a chemical
  reaction occurs such as burning or mixing
  chemicals.

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Chemical Potential Energy

• Potential
• A molecule (group of atoms bound together), such
  as methane, has potential energy.
• The bonds between the atoms store the potential
  energy.

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Chemical Kinetic Energy

• Potential gt Kinetic
• When the methane is ignited, the bonds of the
  atoms break.
• This releases kinetic energy such as heat and
  light.

Observation In this transformation, new bonds
are created between the atoms. Therefore,
potential energy still exists, just in new
molecules.
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Electrical Energy

• Electrical energy is based on the position and
  movement of electrons.
• Moving electrons is known as current. This is
  related to kinetic energy.
• The strength of forces acting on stationary
  electrons is known as voltage. This is related to
  potential energy.

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Electrical Energy

• Electrons repel each other
• A buildup of electrons in one place will create a
  force that pushes the electrons away
• This force causes a voltage or potential energy
• If the electrons are able to move, the potential
  energy will cause a current or kinetic energy in
  the electrons

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Magnetic Energy

• Magnetic energy is based on the attraction, or
  repulsion, of two magnets
• Or
• a magnet and a magnetically susceptible object
• Iron, etc.

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Magnetic Energy

• Remember the suspended ball and gravity
• In magnetism, potential energy can be created by
  suspending objects pulled on or pushed by a
  magnet
• When allowed to move freely, the potential energy
  will transform into kinetic energy

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Electrical and Magnetic Relations

• Magnetic energy can be transformed into
  electrical energy

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Electrical and Magnetic Relations

• Potential
• When a magnet is moved near an open strand of
  wire, potential energy is created on one end of
  the wire.
• Movement of electrons towards one end of the
  wire creates an electrical force.
• This force is the source of the potential energy.

Voltage (Volts)
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Electrical/Magnetic Kinetic Energy

• Potential gt Kinetic
• When the two ends of the wire are connected, the
  negative particles are able to move towards the
  other end.
• The movement of these particles is kinetic energy.

Current (Amps)
Electron Flow
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Demonstration

• Electrical Generation

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What Did We See?

1. List the various kinds of energy that were seen
   in the experiment and where they were seen.
2. Can this form of energy be used on a large scale?
   Could it power more then a light bulb?

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How do We Get Electricity at Home?

1. Steam power about 90
2. Wind power about 10
3. Hydroelectric power less than 1

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Activity

• Electromagnetic Motor

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What Did We See?

1. List the various kinds of energy that were seen
   in the experiment and where they were seen.

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