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This quiz consists of 5 multiple choice and 5 short answer questions through Part 3, Chapters 6-10.

Multiple Choice Questions

1. Approximately how thick is the fifth layer of the Grand Canyon?
(a) 1000 feet.
(b) 200 feet.
(c) 500 feet.
(d) 50 feet.

2. What material makes up the first and youngest layer of the Grand Canyon?
(a) Quartz.
(b) Volcanic ash.
(c) Silt.
(d) Limestone.

3. How long did Dr. Harvey Butchart study the Grand Canyon?
(a) He never studied it.
(b) 17 years.
(c) 25 years.
(d) 5 years.

4. What is the area directly underneath the seventh layer of the Grand Canyon?
(a) The Angle Pass.
(b) The Erosion Surface.
(c) Esplanade.
(d) The Grand Platform.

5. What term does the author use for what comprises the third layer of the Grand Canyon?
(a) The Supai Formation.
(b) The Canyon Layer.
(c) The Grand Layer.
(d) The Great Formation.

Short Answer Questions

1. What is the current age estimate of the sixth layer of the Grand Canyon?

2. Why might the Colorado River cause problems for Fletcher?

3. What did Fletcher say he saw even before he came close to the Grand Canyon?

4. What was the first intrusion from the outside world that Fletcher outlines in "Chapter 10, Exit?"

5. Why did Fletcher decide to see the Grand Canyon the first time?

(see the answer key)

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