Question
Read the following selection.
No one actually knows how big — or small — these are, she says. To calculate their volume, one could theoretically multiply their height times depth times width. But depth is hard to find when only the top of a glacier is visible. The rock underneath might host sharp peaks or deep valleys. It might even be totally flat. "What the bottom of the glacier looks like, there's no way to visually see that," Ellery says.
Why did the author include this idea?
A
It explains how Ellery McQuilkin first got involved with measuring local glaciers.
B
It describes a problem Ellery McQuilkin was trying to solve with her glacier project.
C
It shows what Ellery McQuilkin taught scientists about glaciers near her home.
D
It suggests that Ellery McQuilkin underestimated the size of many glaciers.
No one actually knows how big — or small — these are, she says. To calculate their volume, one could theoretically multiply their height times depth times width. But depth is hard to find when only the top of a glacier is visible. The rock underneath might host sharp peaks or deep valleys. It might even be totally flat. "What the bottom of the glacier looks like, there's no way to visually see that," Ellery says.
Why did the author include this idea?
A
It explains how Ellery McQuilkin first got involved with measuring local glaciers.
B
It describes a problem Ellery McQuilkin was trying to solve with her glacier project.
C
It shows what Ellery McQuilkin taught scientists about glaciers near her home.
D
It suggests that Ellery McQuilkin underestimated the size of many glaciers.
Answers
GPT-4o mini
B It describes a problem Ellery McQuilkin was trying to solve with her glacier project.