Item WE018003: Moving water continuously wears down earth's solid rock layer whenever water is moving over the rock, even if you cannot see it happening.

How long does it take for moving water to wear down earth’s solid rock layer?

  1. Whenever water is moving over solid rock, a little bit of the rock is worn down even if you can’t see it.
  2. Moving water can wear down solid rock, but it takes about ten years or more to cause any change, no matter how small.
  3. Moving water can wear down solid rock, but it takes millions of years or more to cause any change, no matter how small.
  4. Moving water cannot wear down solid rock.

Distribution of Responses

Chart showing distrubtion of responses for Item WE018003

Percent of students responding correctly

Overall47%
Grades 6–845%
Grades 9–1252%
Male48%
Female48%
Primary Language is English47%
Primary Language is not English49%

View data table