Weird and Wondrous Rocks

Which sentence best summarizes the first paragraph of the section “Ringing Rocks County Park, Pennsylvania”?

• People are unsure why the rocks make sounds.

• Many people visit unusual rocks that make sounds.

• Some rocks make sounds that are too low for people to hear.

• People use the sounds of volcanic rocks in the music they make.

How does the author support the idea that the Caverns of Sonora is an interesting cave system?

• by telling how a dog found the caverns

• by comparing the caverns to another planet

• by explaining how to move through the caverns

• by describing the time it takes for caverns to form

The passage says some rocks resemble drinking straws. What does resemble mean?

• are close in appearance to

• are the same color as

• are bigger than

• are used as

Why does the author include information about scientists studying “sailing” rocks in Death Valley?

• to show which types of rocks scientists think will move the farthest

• to describe which rocks scientists believe are most likely to move

• to explain how scientists discovered the reason the rocks moved

• to argue that more scientists should learn about rocks that move

How does the author arrange the passage?

• by explaining how rocks change over time

• by asking and answering questions about rocks

• by arguing which types of rocks are the most beautiful

• by giving examples of the ways rocks are different