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This quiz consists of 5 multiple choice and 5 short answer questions through Part 3, Chapter 9.

Multiple Choice Questions

1. In the 1700s, people were finding holes in theories. For example, if the thoughts on erosion were completely correct, then:
(a) All farmland would have been washed away.
(b) Icebergs would have eroded long ago.
(c) Sand would be ground to fine powder.
(d) There would be no mountains, only smooth hills.

2. Many scientists suspect that Pluto is just a comet of the:
(a) Orion Belt.
(b) Neptunian Belt.
(c) Solar Belt.
(d) Kuiper Belt.

3. Which of the following is not part of an atom?
(a) Neutron.
(b) Morton.
(c) Proton.
(d) Electron.

4. In a span of just 20 years, the number of known moons in the solar system grew from:
(a) 12 to more than 300.
(b) 10 to more than 25.
(c) 30 to more than 90.
(d) 60 to more than 500.

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

Short Answer Questions

1. When was Pluto discovered?

2. Astronomer Edmond Halley believed that the distance from the Earth to the sun could be deduced from the:

3. When radiation was first discovered, people thought it must have:

4. According to the Caltech physicist Richard Feynman, the most important discovery ever made is what?

5. Pluto is the first planet to be discovered by an:

(see the answer key)

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