1. What is the current age estimate of the second layer of the Grand Canyon?
(a) 500 million years.
(b) 50 thousand years.
(c) 10 million years.
(d) 250 million years.

2. When did Fletcher's journey through the Grand Canyon begin?
(a) At daybreak in mid-June.
(b) At sunset in mid-April.
(c) At noon in early October.
(d) At dusk in early February.

3. What river still runs at the bottom of the Grand Canyon?
(a) The Colorado River.
(b) The Gila River.
(c) The Mississippi River.
(d) The Rio Grande.

4. What is the current age estimate of the third layer of the Grand Canyon?
(a) 275 million years.
(b) 500 thousand years.
(c) 350 million years.
(d) 800 years.

5. According to the Fletcher, how did the changes in the earth that formed the Grand Canyon happen?
(a) Very slowly.
(b) Quickly after an eruption.
(c) Dramatically with a large explosion.
(d) Moderately after a cataclysmic event.

Short Answer Questions

1. Fletcher says while studying the Grand Canyon he realized the silence there was not a timeless one as he first thought. How does he define it instead?

2. How long after he saw the Grand Canyon for the first time did Fletcher begin his trip?

3. What is another name for the Erosion Surface?

4. What does Fletcher say he realized he might be doing when he hiked through the Grand Canyon?

5. Who drove Fletcher to the parking area at the edge of the Rim?

(see the answer key)

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