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5/6 History Civ I: Chapter 21

Across
He taught geometry in Alexandria. His text, Elements, was so good it was used for over 2,000 years. He taught king Ptolemy geometry, and is quoted as saying, “There is no royal road to geometry.”
geo- "earth", -metron "measurement" It is all about shapes and their properties.
consists of a screw inside a hollow pipe. As the shaft turns, the bottom end scoops up a volume of water.
He is known for solving a metal density problem in a bathtub!
Down
is the study of the nature and behaviour of natural things and the knowledge that we obtain about them.
He served as librarian of Alexandria. He set about comparing the length of two shadows in two seperate areas in Egypt both at the same time of day. Based on these measurements he was able to calculate the circumference of the earth.
is the study of people and places on the earth