Big News About Old Rocks

Which of the following statements about the Grand Canyon is NOT true?

• The canyon is very old.

• The canyon has rocks.

• The canyon is well-known.

• The canyon is small

Rebecca Flowers and other scientists used new methods to examine the canyon’s rocks. What was the effect of their work?

• They learned that the canyon may be older than once thought.

• They discovered that the canyon was larger than people thought.

• They found a new part of the canyon that was hidden from view.

• They found evidence that the Colorado River cut through Earth’s crust.

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

What can you conclude after reading the passage?

• The Grand Canyon will now receive fewer visitors.

• Most geologists will lose interest in the Grand Canyon.

• Scientists don’t all agree on when the canyon formed.

• Most scientists agree that the canyon isn’t worth studying

Read this sentence from the passage:

“Different [parts] of the canyon evolved at different times,” Flowers told ScienceSpin.

Based on the text, the word evolved most nearly means

• developed

• disappeared

• twisted

• advanced

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

Which statement best describes the central idea of this passage?

• Scientist Rebecca Flowers enjoys studying Earth’s history.

• Millions of people visit the Grand Canyon every year.

• Research reveals new clues about the Grand Canyon.

• The Grand Canyon formed millions of years ago.

The question below has an incomplete sentence. Choose the word that best completes the sentence.

_________ scientists calculated the age of the rocks, they first examined the rocks’ chemicals.

• Because

• While

• Before

• However

How long is the Grand Canyon?

• 277 Miles

• 18 Miles

• 277 kilometers

• 18 kilometers

How wide is the Grand Canyon?

• 277 Miles

• 18 Miles

• 277 kilometers

• 18 kilometers

Which of the following are synonyms for the word calculate?

• determine

• gauge

• complex

• scrutinize

• reckon

Which of the following are synonyms for the word complicated?

• intricate

• gauge

• complex

• messy

• scrutinize