9. What is the shape of the Earth according to modern astronomy?
A. ellipsoid
B. rhomboid
C. oblate spheroid
D. hyperbolic paraboloid
10. Which of the following can be observed of a cruising ship sailing from the port to the open sea?
A. It will not change its size.
B. It will become bigger and bigger.
C. It will become smaller and smaller until it disappears.
D. It will appear to sink then only the sail will be visible until it completely disappears
11. Who believed that spheres were the most perfect shapes and therefore all the heavenly objects
including Earth must be spherical?
A. Aristotle
B. Pythagoras
C. Anaxagoras
D. Eratosthenes
12. What is the measurement of the angle of a shadow cast by a vertical pole in Alexandria?
A. 5.1°
B. 6.1
C. 7.19
D.8.10
13. Why is it that Eratosthenes's calculation of the Earth's circumference solidifies ancient Greeks'
belief of a spherical Earth?
A. It is because he used vertical poles to observe the shadow cast on two different cities.
B. It is because he assumed that the light rays from the Sun are parallel when they reach Earth.
C. It is because he observed the shadows cast on two different cities during the summer solstice.
D. It is because he determined the value of the distance between the two cities from a complete
circle.
14. What is the distance between Syene and Alexandria?
A. 3,000 stadia B. 4,000 stadia C.5,000 stadia
D. 6,000 stadia
15. What causes the difference in the angle of shadows cast in Syene and Alexandria at noon during a
summer solstice according to Eratosthenes?
A. The depth of the well in Syene
B. The curvature of the Earth surface
C. The distance between Syene and Alexandria
D. The height of the vertical pole in Alexandria​