Identify each example as a type of weathering, erosion, or deposition.
a) Rocks scrape against other rocks to make them smoother
b) Oxygen corrodes iron in rocks to cause rusting
c) Wind blows sand across the desert
d) Ocean currents drop sediments along a beach
e) Water enters a crack and freezes, so the ice expands and makes the crack bigger
f) Carbon dioxide and water form a weak acid which reacts with certain minerals