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This quiz consists of 5 multiple choice and 5 short answer questions through Part 5, Chapter 20.

Multiple Choice Questions

1. When was the Big Bang Theory first proposed?
(a) 1960s.
(b) 1850s.
(c) 1790s.
(d) 1920s.

2. When oceanographer Jacques Piccard and a U.S. Navy sailor descended more than 35,000 feet to the deepest part of the world's oceans, what happened?
(a) They startled a flat fish upon touching down.
(b) They saw the remains of a sunken ship.
(c) They were stranded there for days and nearly died.
(d) The power went out in their ocean capsule.

3. When was Pluto discovered?
(a) 1876.
(b) 1957.
(c) 1930.
(d) 1892.

4. Approximately how many bacteria live on a square centimeter of human skin?
(a) 350.
(b) 100,000.
(c) 7,500.
(d) 4,000,000.

5. Arranged side by side, how many atoms can fit across the width of a typical human hair?
(a) Five hundred.
(b) Half a trillion.
(c) Half a million.
(d) Five thousand.

Short Answer Questions

1. The first eruption of Yellowstone took place how many years ago?

2. How many elements occur naturally on Earth?

3. When radiation was first discovered, it was sometimes added to:

4. How deep is Earth's atmosphere?

5. Fred Hoyle came up with the term "Big Bang" while trying to:

(see the answer key)

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