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Item AM039004: The distance between water molecules increases as a cup of water is warmed.

What happens when a cup of water is warmed?

  1. The water molecules break down.
  2. The number of water molecules increases.
  3. The mass of the water molecules decreases.
  4. The distance between the water molecules increases.
Distribution of Responses
Chart showing distrubtion of responses for Item AM039004
Students Responding Correctly
Group Correct Total Percent
Overall 2047 4517 45%
  6–8 1087 2842 38%
  9–12 957 1664 58%
Primary Language

View data table

NGSS does not address thermal expansion or contraction of matter.