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Phase Change EOU Review

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  • What happens to molecules when their kinetic energy decreases?
    they move faster
    they get heavier
    they move slower
    it would depend on the type of molecule
  • I have pink and blue liquid. Both have energy transferred in to them. Only the pink changes phase. Why?
    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
    there is not enough information to answer this question
  • JT has a substance moving in place in a closed container. What happens if he transfers heat into the closed container?
    molecules move faster and the substance would be a liquid
    molecules move slower and the substance would be a solid
    molecules move slower and the substance would be a liquid
    molecules move faster and the substance would be a solid
  • 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
  • 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 the same rate b/c of mass
    Adding heat will increase the kinetic energy at different rates b/c of mass
  • If the same amount of thermal energy is added to these ice samples, which will melt first and why?
    Ice sample 3 because with more mass, kinetic energy will rise faster
    Ice sample 1 because with less mass, kinetic energy will rise faster
  • What state of matter is shown below?
    Solid
    Liquid
    Gas
  • What state of matter is shown below?
    Gas
    Solid
    Liquid
  • What state of matter is shown below?
    Solid
    Gas
    Liquid
  • How does kinetic energy change if molecules move faster?
    it would decrease
    it would depend on the molecule
    it would not change
    it would increase
  • 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
    12 <sup>o</sup>F
    0 <sup>o</sup>F
    6 <sup>o</sup>F
  • What state of matter is shown below?
    Solid
    Liquid
    Gas
  • Grandma's pan is made of aluminum. When are the molecules in the pan moving?
    they are moving when she heats the pan up
    they are moving when she cools the pan down
    they are never moving
    they are always moving
  • 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 around each other then moving away from each other
    molecules were moving away from each other then moving around each other
    molecules were moving in place then moving around each other
    molecules were moving around each other then moving in place
  • What state of matter is shown below?
    Liquid
    Gas
    Solid
  • What happens to molecules when kinetic energy increases?
    they move slower
    they stay the same
    they move faster
    they defy gravity
  • Before leaving home, the pool was 21o C. Later, the pool was warmer. What happened to the molecules?
    they got closer together
    they became larger
    they started moving faster
    they lost cold molecules
  • What state of matter is shown below?
    Liquid
    Gas
    Solid
  • 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
  • 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 in place
    substance 1 had stronger attraction; molecules now move in place
    substance 1 had stronger attraction; molecules now move away from each oth
    substance 1 had weaker attraction; molecules now move around each other
  • Which object below has molecules that are moving?
    the ocean wave
    both have moving molecules
    the glass of water
    neither has moving molecules
  • Lulu heated up 3 identical containers on a stove and recorded their increase in temperature. What explains the results?
    Energy was removed from the 400 g sample to give it a lower temperature
    The same energy was added to all &amp; the increas was proportional to the mass
    More energy was added to the 400 g sample because it had more mass
    More energy was added to the 100 g sample so it increased more
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