Changes to Earth's surface can happen slowly or quickly. Which of these changes happens the most quickly?
A B C D
a mountain eroding to a hill a river making a delta a glacier making a canyon a storm moving a sandbar
Question: Changes to Earth's surface can happen slowly or quickly. Which of these changes happens the most quickly?
(A) a mountain eroding to a hill
(B) a river making a delta
(C) a glacier making a canyon
(D) a storm moving a sandbar

Answer: (D) a storm moving a sandbar
Answer: (B) a river making a delta
Question: Changes to Earth's surface can happen slowly or quickly. Which of these changes happens the most quickly?
(A) a mountain eroding to a hill
(B) a river making a delta
(C) a glacier making a canyon
(D) a storm moving a sandbar
Answer: (D) a storm moving a sandbar