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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 9: Hands on Heaven's Clock.

Multiple Choice Questions

1. When did clock makers begin to design clocks to measure longitude?
(a) 15th century.
(b) 17th century.
(c) 14th century.
(d) 16th century.

2. What did Harrison build that still function today?
(a) Microscopes.
(b) Telephones.
(c) Telescopes.
(d) Clocks.

3. What does the coiled balance spring do in clocks?
(a) Prevents waves from destabilizing the clock.
(b) Prevents the pendulum from losing time.
(c) Allows the navigator to know the time in the home port.
(d) Allows the clock to keep a constant temperature.

4. What did Hadley and Godfrey invent?
(a) A working telescope.
(b) A method to calculate lunar distance.
(c) A working clock.
(d) A celestial navigation map.

5. What year was Harrison born?
(a) 1693.
(b) 1650.
(c) 1715.
(d) 1727.

Short Answer Questions

1. What was the punishment for mutiny on the Association?

2. What advantage did the magnetic variation method have over astronomical approaches at determining longitude?

3. What does the term "dead reckoning" refer to?

4. What did Huygens and Hooke fight over?

5. Early clocks weren't up to measuring longitude at sea for two reasons. They were not accurate and changed because of what while at sea?

(see the answer key)

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