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Phase Change EOU Review

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  • What happens to molecules when kinetic energy increases?
    they move faster
    they move slower
    they defy gravity
    they stay the same
  • If the same amount of thermal energy is added to these ice samples, which will melt first and why?
    Ice sample 1 because with less mass, kinetic energy will rise faster
    Ice sample 3 because with more mass, kinetic energy will rise faster
  • How does kinetic energy change if molecules move faster?
    it would not change
    it would increase
    it would depend on the molecule
    it would decrease
  • What state of matter is shown below?
    Gas
    Liquid
    Solid
  • Ty had a container of a substance in the gas phase. He left it outside. Upon returning, it was a liquid. What happened?
    molecules were moving in place then moving around each other
    molecules were moving around each other then moving in place
    molecules were moving around each other then moving away from each other
    molecules were moving away from each other then moving around each other
  • Lulu heated up 3 identical containers on a stove and recorded their increase in temperature. What explains the results?
    The same energy was added to all & the increas was proportional to the mass
    Energy was removed from the 400 g sample to give it a lower temperature
    More energy was added to the 100 g sample so it increased more
    More energy was added to the 400 g sample because it had more mass
  • Which object below has molecules that are moving?
    neither has moving molecules
    the ocean wave
    the glass of water
    both have moving molecules
  • What state of matter is shown below?
    Gas
    Solid
    Liquid
  • What happens to molecules when their kinetic energy decreases?
    they move slower
    they move faster
    it would depend on the type of molecule
    they get heavier
  • INDEPENDENT VARIABLE - YOU CONTROL Which statement below would be an independent variable
    Time studying for the phase change critical juncture
    Test score on the phase change critical juncture
  • Grandma's pan is made of aluminum. When are the molecules in the pan moving?
    they are never moving
    they are moving when she heats the pan up
    they are moving when she cools the pan down
    they are always moving
  • What state of matter is shown below?
    Liquid
    Solid
    Gas
  • Before leaving home, the pool was 21o C. Later, the pool was warmer. What happened to the molecules?
    they became larger
    they got closer together
    they lost cold molecules
    they started moving faster
  • DEPENDENT VARIABLE - CHANGE IN RESPONSE TO IND. VARIABLE Which statement below would be a dependent variable?
    Time studying for the phase change critical juncture
    Test score on the phase change critical juncture
  • What state of matter is shown below?
    Gas
    Solid
    Liquid
  • Two substances were in liquid form and got energy transferred out. Substance 1 changed, but substance 2 didn't. Why?
    substance 1 had weaker attraction; molecules now move around each other
    substance 1 had stronger attraction; molecules now move away from each oth
    substance 1 had stronger attraction; molecules now move in place
    substance 1 had weaker attraction; molecules now move in place
  • What state of matter is shown below?
    Solid
    Gas
    Liquid
  • What state of matter is shown below?
    Liquid
    Solid
    Gas
  • Using the pattern shown in the table, what would you expect the temperature increase to be of a 300 g sample?
    6 <sup>o</sup>2
    6 <sup>o</sup>F
    0 <sup>o</sup>F
    12 <sup>o</sup>F
  • I have pink and blue liquid. Both have energy transferred in to them. Only the pink changes phase. Why?
    there is not enough information to answer this question
    blue has weaker attraction; now the molecules move away in place
    pink has stronger attraction; now the molecules move away from each other
    pink has weaker attraction; now the molecules move away from each other
  • Why will these ice samples not melt at the same rate even when they are exposed to the same amount of heat?
    Adding heat will increase the kinetic energy at different rates b/c of mass
    Adding heat will increase the kinetic energy at the same rate b/c of mass
  • JT has a substance moving in place in a closed container. What happens if he transfers heat into the closed container?
    molecules move slower and the substance would be a solid
    molecules move faster and the substance would be a liquid
    molecules move faster and the substance would be a solid
    molecules move slower and the substance would be a liquid
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