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Item WE064001: A rock in a stream can get smaller by colliding with other rocks or by some of it dissolving in water.

How could a rock in a stream get smaller?

  1. A rock in a stream could get smaller by colliding with other rocks or by some of it dissolving in water.
  2. A rock in a stream could get smaller by colliding with other rocks, but not by some of it dissolving in water.
  3. A rock in a stream could get smaller by some of it dissolving in water, but not by colliding with other rocks.
  4. A rock in a stream cannot get smaller colliding with other rocks or by some of it dissolving in water.
Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 2514
6–8
n = 1515
9–12
n = 989
Male
n = 1219
Female
n = 1251
English
n = 2222
Other
n = 221
A. A rock in a stream could get smaller by colliding with other rocks or by some of it dissolving in water. 54% 51% 59% 56% 53% 55% 46%
B. A rock in a stream could get smaller by colliding with other rocks, but not by some of it dissolving in water. 21% 22% 20% 19% 23% 21% 18%
C. A rock in a stream could get smaller by some of it dissolving in water, but not by colliding with other rocks. 14% 15% 13% 15% 14% 14% 21%
D. A rock in a stream cannot get smaller colliding with other rocks or by some of it dissolving in water. 11% 12% 8% 10% 11% 10% 14%