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Energy and it’s effects

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  • Objects increase in what when heated?
    In volume
  • Light reflects perfectly off what kind of surfaces?
    Very smooth flat surfaces
  • How does light travel?
    In a straight line and in all directions
  • What is it called when still objects can begin to move and moving objects can stop or change direction?
    Changes in movement
  • What are the effects of mechanical energy?
    Deformation, changes in movement, increase in temperature, sound
  • What is mechanical energy transmitted from a vibrating object to another object through air,water,or another object or substance?
    Sound!
  • What is it called when objects change shape, break, become squashed, bounce or vibrate?
    Deformation
  • What happens when light hits an object?
    It can bounce off of it!
  • True or False: light travels very very slowly
    False
  • What is light?
    A form of energy emitted by light sources
  • What happens when heat is transferred to an object?
    It gets hotter
  • What happens when an object releases thermal energy?
    It cools
  • What happens when objects knock or rub against each other?
    Can cause an increase in temperature
  • Objects decrease in volume when?
    Cooled
  • True or False: heat cannot be transferred
    False
  • What is made up of a mixture of different colored rays?
    White light from the sun
  • How is light perceived?
    With our eyes!
  • Why do objects look deformed if we put them under water?
    Refraction
  • What can light pass through?
    Some materials but not all
  • What is changes in movement?
    Still objects can begin to move and moving objects can stop or change direction
  • True or False: light does not travel in a straight line
    False
  • What are 3 effects of heat?
    Variations in temperature, expansion, state changes
  • What happens when light travels through a transparent object?
    It changes speed and direction.
  • What is heat?
    The transfer of thermal energy from a type of matter with a higher temperature to one with a lower temperature.
  • What do we measure as temperature?
    The amount of thermal energy something has
  • How fast does light travel?
    Around 300,000 kilometers per second in a vacuum
  • How is a rainbow created?
    When white light travels through certain substances it separates into different colors
  • When heated what can change state?
    Matter
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