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?
- A rock in a stream could get smaller by colliding with other rocks or by some of it dissolving in water.
- A rock in a stream could get smaller by colliding with other rocks, but not by some of it dissolving in water.
- A rock in a stream could get smaller by some of it dissolving in water, but not by colliding with other rocks.
- A rock in a stream cannot get smaller colliding with other rocks or by some of it dissolving in water.
| 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% | 

