Quiz Answer Key and Fun Facts
1. A line of constant longitude on Earth is synonymous with what measurement of Earth?
2. One degree of longitude is equal to approximately how many miles at the Earth's poles?
3. What are very accurate clocks and other timepieces that are helpful in longitude calculations commonly known as today?
4. Who is the "Lone Genius", the man credited with devising the first extremely accurate method for determining one's longitude at sea? This man was the subject of the book "Longitude" by Dava Sobel.
5. What is a line of constant longitude known as?
6. The International Date Line is at what degree of longitude?
7. Giovanni Domenico Cassini utilized the moon(s) of which planet to assist mapmakers in longitude measurements?
8. The English Longitude Act of 1714 was passed shortly after the fatal shipwreck of which notable admiral off the Scilly Isles?
9. If someone has a very accurate clock for a known longitude, he/she can calculate his/her own longitude rather easily. If the sun is at the highest point in the sky (local noon) at 12:00 for your reference point and is at its highest point at 2:00 where you are now, what is your longitude with respect to your reference point?
10. Longitude measurements are not only used on Earth. Celestial longitude measurements are calculated using "a table giving the coordinates of a celestial body at a number of specific times during a given period." What is this table commonly known as?
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