1. What organization opposed geologist Clair Patterson and his campaign?
(a) American Academy of Pediatrics.
(b) American Dairy Association.
(c) Swimming Pool Safety Institute.
(d) American Petroleum Institute.

2. Which of the following is not a layer of Earth?
(a) Crust.
(b) Filling.
(c) Mantle.
(d) Core.

3. Invented in the 1930s, chlorofluorocarbons (CFCs) have proven to be damaging to:
(a) Underground caves.
(b) The ozone layer.
(c) Refrigerator production.
(d) The tourism industry.

4. Anders Celsius, who designed the Celsius thermometer, was an:
(a) Engineer.
(b) Artist.
(c) Architect.
(d) Astronomer.

5. When radiation was first discovered, it was sometimes added to:
(a) Drinking water.
(b) Gasoline and alcohol.
(c) Toothpastes and laxatives.
(d) Stews and casseroles.

Short Answer Questions

1. In 1971, Mike Voorhies discovered an amazing fossil bed in Nebraska full of skeletons of prehistoric animals killed 12 millions years ago. How did they die?

2. Today, scientists know that radiation in high doses is:

3. Approximately how many miles are there from Earth's surface to its core?

4. How deep is Earth's atmosphere?

5. What is the highest elevation that humans are able to live and survive on Earth continuously without special accommodations?

(see the answer key)

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