Question

erosion usually happens slowly. the effect of erosion over a few weeks or months can be hard to see. but, over millions of years, erosion can make a place look very different. the following pictures show what an area might look like before and after millions of years of erosion. first, match the words to the pictures. then, answer the question. how did erosion change this area? pieces of rock from the mountains were carried away by ice, water, and wind. over time, the mountains got shorter. pieces of rock were left behind on the mountains by ice, water, and wind. over time, the mountains got taller.

Explanation:

Matching the Words to the Pictures:

To match "before" and "after" to the pictures, we know that erosion over millions of years makes mountains shorter (by carrying away rock). The right - hand picture shows taller, more rugged mountains, which should be the "before" state (before erosion has had a large - scale effect). The left - hand picture shows shorter, more eroded - looking mountains, which is the "after" state (after millions of years of erosion). So the left picture's box gets "after" and the right picture's box gets "before".

Answer:

ing the Question "How did erosion change this area?":
We know that erosion is the process where ice, water, and wind carry away pieces of rock from the mountains. Over time, as more and more rock is carried away, the mountains become shorter. The second option says that pieces of rock were left behind and mountains got taller, which is incorrect. So the correct explanation is that pieces of rock from the mountains were carried away by ice, water, and wind. Over time, the mountains got shorter.

Final Answers:

• Matching: Left picture box: after; Right picture box: before.
• How erosion changed the area: Pieces of rock from the mountains were carried away by ice, water, and wind. Over time, the mountains got shorter.