Log In | Register

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
Students Responding Correctly
Group Correct Total Percent
Overall 722 1166 62%
  6–8 423 713 59%
  9–12 299 453 66%
Primary Language

View data table

See NGSS Performance Expectation MS-ESS2-2: Construct an explanation based on evidence for how geoscience processes have changed Earth's surface at varying time and spatial scales.