Geometry of the Earth Long before Columbus, a Greek scholar names Eratosthenes (274-194BC) calculated the circumference of Earth by making some simple observations about shadows at noon and applying some insights from geometry.
The size of Earth has been estimated and measured many time since then. The French Academy of Sciences tried to make an accurate measurement in the late 1700s in order to create a new unit of measure, the meter. They proposed to define the meter as one ten-millionth of the distance from the North Pole to the equator.
Today we can measure Earth's circumference very accurately using data from satellites and making calculations on computers. The circumference at the equator is 24,901.55 miles. Earth is not a perfect sphere, however, because its rotation causes it to bulge a little at the equator. So the circumference from pole to pole is a bit smaller, about 24,859.82 miles.
3960 miles
4530 miles
6300 miles
7920 miles
Rate this question:
1031 miles
1036 miles
1038 miles
1042 miles
Rate this question:
22 centuries
20 centuries
18 centuries
16 centuries
Rate this question:
700 miles per hour
7000 miles per hour
10,000 miles per hour
14,000 miles per hour
Rate this question:
Quiz Review Timeline (Updated): Mar 20, 2023 +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
Exploring The Cataclysmic Pole Shift Hypothesis Quiz
Test your knowledge about theories of Earth's geology with our Cataclysmic Pole Shift Hypothesis Quiz. This engaging and educational quiz is designed to challenge your...
Questions:
10 |
Attempts:
23 |
Last updated:
Apr 09, 2024
|
How Much Do You Know About Isotope Geochemistry? Quiz
Dive into the fascinating world of Isotope Geochemistry with our meticulously designed Isotope Geochemistry Quiz! Whether you're a budding geoscientist, an avid earth science...
Questions:
10 |
Attempts:
50 |
Last updated:
Oct 04, 2024
|
How Well Do You Know About Earth's Rotation Day?
Get ready for a cosmic joyride with our Earth’s Rotation Day Quiz! Spin into fun facts, quirky questions, and discover the playful side of our planet's daily twirl. From...
Questions:
10 |
Attempts:
28 |
Last updated:
Dec 21, 2023
|
Quiz: Test Your Knowledge On Earth's Evolutionary History!
Welcome to our captivating quiz on Earth's Evolutionary History! Embark on a journey through millions of years as we explore the remarkable changes our planet has undergone....
Questions:
10 |
Attempts:
150 |
Last updated:
Mar 20, 2025
|
Earth Primary School Quiz
How much do you know about Earth? Do you know Earth has how many layers? What is Rotation? What is Revolution? Check out our online earth quiz to learn exciting facts about this...
Questions:
11 |
Attempts:
659 |
Last updated:
Mar 26, 2025
|
Movement Of Earth Quiz
Social studies are the integrated study of multiple fields of social science and the humanities, including history, geography, and political science. This is a Social Studies...
Questions:
16 |
Attempts:
5703 |
Last updated:
Mar 20, 2025
|
Wait!
Here's an interesting quiz for you.