Item WE015003: Water can make a valley deeper by breaking the solid rock layer and carrying loose rocks away from the valley.

In the river valley shown below, there are loose rocks on top of a solid rock layer. Can water make the valley deeper?

  1. No, valleys do not get deeper.
  2. No, valleys can get deeper, but water cannot make them deeper.
  3. Yes, water can make the valley deeper by breaking off pieces of rock from the solid rock layer of the valley and by carrying loose rocks away from the valley.
  4. Yes, water can make the valley deeper by carrying loose rocks away from the valley, but water cannot break off pieces of rock from the solid rock layer of the valley.
Distribution of Responses
Chart showing distrubtion of responses for Item WE015003
Students Responding Correctly
Group Correct Total Percent
Overall 811 1372 59%
Grades
  6–8 496 827 60%
  9–12 309 535 58%
Gender
  Male38865859%
  Female41269759%
Primary Language
  English728121960%
  Other6711757%

View data table