### energy:

Electrical energy
* Most electrical energy is generated by generators
  - stations
  - transfered by electricity
  - produces energy
* Some electrical energy becomes heat
  - comes from forces
  - is transfered by motors
  - passes through wire
  - reduces resistance
* Some electrical energy uses devices
  - electronic devices
* can be dangerous
  - relatively easily and cheaply transferred over large distances
* comes from the potential created by opposing positive and negative charges.
* drives many small machines and keeps lights glowing.
* exists when charged particles attract or repel each other.
* flows along a path, called a circuit
  - through a portion of the body causing a shock
* is also common in nature
  - energy in motion
  - by far the single greatest cost involved in desalination
  - changed into heat in a hotplate
* is converted into light energy in the headlights
  - mechanical energy in an electric motor
  - created by spatially separating positive and negative charge
  - due to the electrical force
* is energy
  - that is caused by moving electric charges
  - for use in west-central Colorado
  - from the steam harnessed into pipes from underground water courses
  - when the generator windings rotate in a strong magnetic field
  - with very high efficiency and zero emissions from the vehicle itself
  - input into a loudspeaker
  - less like a substance
  - measured in kilowatt-hours
  - of very high value
  - required in order to keep the bacterial floc in suspension by stirring
* is the energy newly derived from electric potential energy or kinetic energy
  - fuel for the digital economy
  - kinetic energy of the electrons in the wire
  - moving electrical charges from one point to another in a conductor
  - transformed into heat and light energy
  - used to power a lamp
  - useful only when it flows in both directions
  - utilized in most lasers and chemical hazards abound as well
* kind of kinetic energy.
* measurable force that also creates magnetic fields.
* produces a hot spark
* refers to energy associated with the flow of electrons.
* runs televisions, stereos, toasters and light bulbs.
* secondary source of energy.

### energy:

Electromagnetic energy
* All electromagnetic energy travels in waves.
* Some electromagnetic energy includes light.
* exists as waves, with an extremely wide range of wavelengths
  - in nature
* has distinctive properties.
* includes light, radio waves, infrared radiation, and x-rays.
* is constrained to exist in discrete quantum units
  - light waves, radio waves, magnetic fields, and electric fields
* is the energy emitted from vibrating charges inside the circuit
  - transferred by radiation
* is the same as radiation or light energy
  - thought to cause cancer by depressing nighttime melatonin levels
  - used to produce images using remote sensing devices
* passes through space at the speed of light in the form of sinusoidal waves.
* travels as waves ranging from gamma rays to radio waves.

Emotional energy
* combination of the physical and mental energy level.
* is useful when it encourages participation and change.

Energy flow
* All energy flows come through other people.
* fuels the biogeochemical, or nutrient, cycles.
* is natural, and occurs effortlessly.
* is the amount of energy that is transferred through a food chain up the trophic level
  - moves throughout a food chain
  - movement of chemical energy through a food chain
* occurs within cells.
* produces a distinct structure in ecosystems.

Energy level
* Some energy levels have energy
  - lower energy
* are an indicator of health
* can plummet due to lack of oxygen-rich red blood cells.
* fluctuate during the day and are unique to individuals.
* go down due to lack of oxygen-rich red blood cells.
* vary for people during the day.