Jo was out tramping with her friend Aroha. She picked up a stone on the top of a mountain, looked out towards the coast and said, "One day, Aroha, this stone will be sand on that beach down there".
a) Describe two ways that Jo's stone could be broken down by weathering before it reaches the beach.
b) What is the most likely way stones would "move" from the tops of mountains to the coast?
