Untitled Flashcards

Front

What are two causes for the ringing in the rocks?

Back

Some scientists believe that high iron levels cause the ringing in the rocks. Others believe that "repeated freezing and thawing" causes stress in the rocks which then causes them to ring.

Front

What is the author's purpose in using cause and effect in page 37?

Back

The author wanted to explain why the rocks make the noise.

Front

What mystery did scientists want to solve in Death Valley National Park?

Back

They wanted to figure out how the rocks moved across the playa of Death Valley.

Front

What text structure does the author use to organize information about the mystery?

Back

problem-solution

Front

What did the scientists do to solve the mystery?

Back

They set up a weather station, put tracking devices in many kinds of rocks, and recorded their movement with time-lapse cameras.

Front

What causes the rocks to move?

Back

Melted snow creates a pond that freezes. The ice breaks off with rocks on top. The blowing wind causes the ice sheets to slide and carry the rocks with them.