Item WE031002: It takes many millions of years to wear away a mountain until it is almost flat.

How long would it take for water and wind to wear away the solid rock of a mountain that is now 5,000 feet high until it is only 50 feet high?

  1. About 50 years
  2. About 500 years
  3. Many millions of years
  4. Wind and water could never wear away the solid rock of a mountain that much.

Distribution of Responses

Chart showing distrubtion of responses for Item WE031002

Percent of students responding correctly

Overall62%
Grades 6–859%
Grades 9–1266%
Male64%
Female61%
Primary Language is English64%
Primary Language is not English53%

View data table