I'd say that the answer is erosion
Explanation:
Student A would be introducing more error. While student B is subtracting the actual filter paper used in the experiment, Student A is using the mass of a different filter paper, which may have a slightly different mass than the filter paper that was used. To avoid having to aacount for this, or introducing such an error, follow Student B in weighing the filter paper before adding the sand.
I hope this helps.
Answer:
A. Any type of rock can change into any other type of rock by weathering and erosion.
C. Rocks change slowly over time.
D. The rock cycle shows how the three rock types relate to one another.
