It scrapes small particles off large rocks. It carries plants down mountains and to oceans. It melts and becomes part of streams and rivers. It freezes small particles of dirt to form large rocks.
I gave my students this multiple choice question: A glacier is a slow moving river of ice. How does a glacier help create soil?

Only one answer is correct among these 4 choices:
- It scrapes small particles off large rocks.
- It carries plants down mountains and to oceans.
- It melts and becomes part of streams and rivers.
- It freezes small particles of dirt to form large rocks.

Could you tell me which one is correct?

It scrapes small particles off large rocks.