2nd Grade - Forms of Energy

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39 words 52 learners

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Full list of words from this list:

words only definitions & notes
  1. sound wave
    (acoustics) a wave that transmits sound
    The vibration of the object pushes the air molecules nearby which travel as sound waves to the listener.
  2. electromagnetic spectrum
    the entire frequency range of electromagnetic waves
    The portion of the electromagnetic spectrum that humans can see is commonly called “light.”
  3. electrical energy
    energy made available by the flow of electric charge through a conductor
    Electrical energy is created when electrons, small particles of atoms, are caused to move along a path called a circuit.
  4. kinetic energy
    the mechanical energy that a body has by virtue of motion
    Kinetic energy is the energy which comes from movement, and potential energy is the stored energy which comes from an object’s placement.
  5. electrical circuit
    an electrical device that provides a path for electrical current to flow
    When we turn on a light, we are closing an electrical circuit and the lights come on.
  6. refract
    subject to change in direction of a propagating wave
    Light can also be refracted, meaning it can be “bent” when it travels from one medium to another.
  7. mechanical energy
    energy in a mechanical form
    Mechanical energy is the energy which is possessed by an object due to its motion or due to its position.
  8. heat energy
    a form of energy that is transferred by a difference in temperature
    A fire, a hot cup of coffee, or a heating stove has “thermal” or heat energy.
  9. kinetic
    relating to the motion of material bodies and their forces
    Mechanical energy can be in the form of kinetic or potential energy.
  10. potential energy
    energy stored by a body or system by virtue of its position
    Mechanical energy can be in the form of kinetic or potential energy.
  11. electromagnetic
    pertaining to or exhibiting magnetism produced by electric charge in motion
    The portion of the electromagnetic spectrum that humans can see is commonly called “light.”
  12. electron
    an elementary particle with negative charge
    Electrical energy is created when electrons, small particles of atoms, are caused to move along a path called a circuit.
  13. insulator
    a material with little electrical or thermal conductivity
    Materials through which electrons flow easily, such as copper wire, are called conductors, while materials such as rubber or plastic, which do not allow electrons to flow through them as easily are called insulators.
  14. thermal
    relating to or associated with heat
    A fire, a hot cup of coffee, or a heating stove has “thermal” or heat energy.
  15. light bulb
    electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity
    We can adjust the amount of electrical energy in a light bulb if we want a room to be brighter or dimmer.
  16. electric motor
    a motor that converts electricity to mechanical work
    All electric motors in everything from toy cars to powerful fans use electromagnetic fields to create their power.
  17. laser
    an optical device that produces an intense beam of light
    Laser lights have become important tools for doctors in surgery, for the manufacture of CD and DVD players and computers, and even for teachers and speakers who use laser pointers in their presentations.
  18. microwave
    a kitchen appliance used to heat and cook food
    A microwave works differently; it uses microwaves (longer waves around a food in length are the ones that help heat food in the microwave itself) to make the particles inside the food move more rapidly.
  19. molecule
    the simplest structural unit of an element or compound
    The higher the temperature the faster the particles, or molecules, of an object are moving.
  20. particle
    (nontechnical usage) a tiny piece of anything
    The higher the temperature the faster the particles, or molecules, of an object are moving.
  21. electrical
    relating to or concerned with electricity
    Electrical energy is created when electrons, small particles of atoms, are caused to move along a path called a circuit.
  22. dimmer
    a rheostat that varies the current through an electric light in order to control the level of illumination
    We can adjust the amount of electrical energy in a light bulb if we want a room to be brighter or dimmer.
  23. pointer
    a mark to indicate a direction or relation
    Laser lights have become important tools for doctors in surgery, for the manufacture of CD and DVD players and computers, and even for teachers and speakers who use laser pointers in their presentations.
  24. atom
    the smallest component of an element
    All matter is made up of atoms.
  25. mechanical
    using tools or devices
    Mechanical energy is the energy which is possessed by an object due to its motion or due to its position.
  26. DVD
    a digital recording (as of a movie) on an optical disk that can be played on a computer or a television set
    Laser lights have become important tools for doctors in surgery, for the manufacture of CD and DVD players and computers, and even for teachers and speakers who use laser pointers in their presentations.
  27. electricity
    a physical phenomenon that can produce light, heat and power
    For the electrons to flow and electricity to be evident, the circuit must be closed, that is to say the path along which electrons are flowing must not be broken, or open, anywhere along the way.
  28. spectrum
    a broad range of related objects, values, or qualities
    The portion of the electromagnetic spectrum that humans can see is commonly called “light.”
  29. humans
    all of the living human inhabitants of the earth
    The portion of the electromagnetic spectrum that humans can see is commonly called “light.”
  30. telescope
    a magnifier of images of distant objects
    Curved lenses in telescopes refract light in order to magnify the picture.
  31. computer
    a machine for performing calculations automatically
    It takes energy to cook a meal, ride a bicycle, speak to a friend, turn on a computer, or listen to a song.
  32. temperature
    the degree of hotness or coldness of a body or environment
    Temperature is really a measure of how much thermal energy an object has.
  33. surgery
    science treating disease or injury by operative procedures
    Laser lights have become important tools for doctors in surgery, for the manufacture of CD and DVD players and computers, and even for teachers and speakers who use laser pointers in their presentations.
  34. planet
    a celestial body that revolves around the sun
    Without sources of energy, the Earth would be a lifeless planet.
  35. copper
    a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor
    Materials through which electrons flow easily, such as copper wire, are called conductors, while materials such as rubber or plastic, which do not allow electrons to flow through them as easily are called insulators.
  36. metal
    a chemical element or alloy that is usually a shiny solid
    Sound waves can be demonstrated by striking a metal rod and feeling the vibration of the ringing rod or by simply placing our hand on our throat and speaking.
  37. electric
    using or providing the flow of charge through a conductor
    All electric motors in everything from toy cars to powerful fans use electromagnetic fields to create their power.
  38. brain
    the organ that is the center of the nervous system
    Our ears are designed to be sensitive to these waves of sound, which our brain translates back into the voice which we hear.
  39. human
    a person; a hominid with a large brain and articulate speech
    The portion of the electromagnetic spectrum that humans can see is commonly called “light.”
Created on Fri Oct 21 11:28:09 EDT 2011

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