41: The Nature of Energy

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4-1 The Nature of Energy

• About 34 chances for points (give or take)

2
What is Energy

• Energy gives things the ability to ______ the
  environment around themselves.
• change
• Name four types of energy
• Electrical
• Chemical
• Radiant
• Thermal
• Give an example of each one
• Listen to student answers

3
II. Kinetic Energy

• Kinetic energy is the energy of an object due to
  its ______.
• motion
• What is the formula for kinetic energy?
• KE ½ mv2
• What do the variables stand for?
• KE kinetic energy
• M mass
• v2 velocity squared

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II. Kinetic energy

• What are the units for each variable?
• KE
• Joules
• m
• kg
• v2?
• m2/s2
• Please try 1 on page 102

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III. Potential Energy

• Money in the bank is stored for later. It has
  the potential to buy something in the future.
  How is potential energy like money in the bank?
• Objects with potential energy have the potential
  to cause change.
• What is one way to increase an objects potential
  energy?
• Raise it higher from the ground
• Storing energy in something that can stretch is
  compress is storing ______ _______ energy.
• Elastic potential

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Potential Energy, continued

• When plants store energy as glucose, they are
  changing radiant energy into ______ _____ energy.
• Chemical potential energy
• When something gets higher, it has farther to
  fall. Therefore, gravity acts on it longer.
  This increases.the objects ______ ______ energy.
• Gravitational potential energy

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Potential Energy, continued

• What is the formula for gravitational potential
  energy?
• GPE mgh.
• Name the variables
• GPE gravitational potential energy
• m mass
• g acceleration due to gravity
• h height of the object

8
Potential energy

• Please try 2 on page 104.