OPTIONS: -sand; -h2o; -crust; -gravel; -crackers; -clouds; -calcite; -soils;

Fact 1: Weathering means breaking down rocks from larger whole into smaller pieces by weather. Fact 2: Unconsolidated rock is rock such as gravel. Given the two facts above, in weathering, what is broken down from larger to smaller pieces?
Answer:
gravel