Energy Basics

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Energy Basics
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Energy

• The ability to do work or cause change
• Either potential or kinetic

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Potential Energy

• Energy that is stored

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Kinetic Energy

• The energy of motion

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Forms of Energy

• Energy can be found in many forms
• Can be converted from one form or another
• Conversion can be both man made and natural
  process
• Forms include chemical, thermal, elastic,
  radiant, mechanical and nuclear.

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Chemical Energy

• Stored in chemical bonds holding the atoms of
  compounds together
• Food, wood, batteries, fossil fuels

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Electrical Energy

• Energy of moving electrons
• Invisible but most useful
• form
• When the electrons are
• separated from positive
• charges and then forced
• along a closed path in
• a conduction material
• ex copper

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Mechanical Energy

• Most familiar-involved with moving objects atoms
  are moving and pushing each other
• Sound is another example-occurs when atoms in a
  media vibrate in a direction outward from the
  sound source.

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Radiant or Light Energy

• Produced when atoms absorb energy from an outside
  source and release energy as electromagnetic
  radiation
• Most are invisible except for visible light
• UV rays, X-rays, radio waves

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Thermal Energy

• A special form of kinetic energy
• Energy of moving or vibrating molecules
• The faster the molecules vibrate the hotter they
  become

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Elastic Energy

• Energy stored in a solid object when it is either
  stretched or compressed.
• A stretched rubber band, compressed spring or
  jack-in-the-box

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Nuclear Energy

• Energy stored in the nuclei of atoms
• Released by fission, the splitting of nuclei of
  heavy atoms
• Released by fusion-the combining of nuclei of
  light atoms
• The sun is an example-fusion fuels it