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Changes of States Review Game

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  • What is a word that means changing from a liquid to a gas?
    boiling/evaporating/vaporizing
  • Why is dry ice an example of sublimation?
    Because it changes from solid to a gas skipping the liquid state.
  • How is sublimation different from vaporization?
    Sub. - solid to gas Vap. - liquid to a gas
  • Why is frost an example of deposition?
    Because water vapor changes directly to a solid skipping the liquid state.
  • What causes thermal expansion?
    adding heat/energy/increase in temperature/particles vibrating more rapidly
  • True or False? Heating or cooling will cause the mass of a substance to change.
    False
  • How have engineers avoided issues to bridges caused by thermal expansion and contraction?
    expansion joints
  • What's wrong? Matter is often conserved in a physical change?
    Often should read always.
  • True or False? Water changes to ice at 32 degrees Celsius.
    false - it's 32 degrees Fahrenheit
  • Fill in the Blank: A change of state is a _____________ change.
    physical
  • How are boiling and evaporation the same?
    They both change a liquid to a gas.
  • How do you change a liquid to a solid?
    Remove energy.
  • When will a solid change to a liquid?
    When enough energy (heat) is added.
  • What happens to a gas when energy is removed from a gas?
    It turns to a liquid/condenses.
  • What happens to most substances when they get colder?
    They contract/particles vibrate more slowly/eventually freeze.
  • What causes the water vapor to condense on the outside of a lemonade pitcher on a hot day?
    The coolness of the pitcher removes the energy from the water vapor causing it to change to water droplets.
  • What will most solids do when they are heated?
    melt/expand
  • What is a word that means changing from a solid to a liquid?
    melting
  • What happens to a substance’s particles when energy is added?
    They speed up.
  • How is ice an exception to the thermal contraction/expansion rule?
    When water freezes to ice the volume increases rather than decreases.
  • Why do different kinds of matter change states at different temperatures and at different rates?
    Each change depends on the particles and the forces.
  • True or False? Heating or cooling will cause the volume of a substance to change.
    True
  • How are deposition and sublimation similar?
    They both involve skipping a step when changing states of matter.
  • How are boiling and evaporation different?
    Boiling is rapid while evaporation is slow/gradual.
  • Thermal expansion and contraction can strain bridges. Explain what is actually causing the bridge to weaken or break?
    The bridge changing length straining the structural components.
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