∆ 9. When are hit by waves over thousands of years, a beach of sand is formed.__ ∆ 10. Sand, and waves hit rocks and smooth out the surface of older rocks.__

∆ 11. can hold back soil from eroding and also break rocks apart – causing erosion.__

∆ 12. Water flows into cracks of rocks and shrinks / expands when it freezes causing the rock to crack. (pick one)__

∆ 13. As water flows over rocks, it dissolves minerals causing different to sometimes appear.__

∆ 14. Pounding water, wind, and rain are major causes of erosion.__

∆ 15. Chemicals in the air / plants contribute to erosion. (pick one)