quiz

Question 1

two navigators who was credited for circumnavigating the earth and for proving that earth is not flat

Answer 1

Ferdinand Magellan

Juan Sebastian Elanco

Question 2

Groups who believed that earth had corners

Answer 2

Babylonian, Hebrews,Egyptians and Chinese

Question 3

found out the differences in the motion of each planet that should be considered to give an accurate description of the universe

Answer 3

Eudoxus of Cnidus

Question 4

Greek Philosophers speculated that Earth was actually spherical around what year?

Answer 4

6 before common era

Question 5

described that the Earth and heavens are spherical

Answer 5

plato and aristotle

Question 6

started the idea of spherical earth

Answer 6

Pythagoras

Question 7

first astronomer to explain the retrograde motion of the planets in the sky

Answer 7

Eudoxus of Cnidus

Question 8

used to observe the sky and stars

Answer 8

unaided eyes

Question 9

estimated the circumference of the earth

Answer 9

Eratosthenes

Question 10

the universe was composed of Earth and five other planets (mercury, venus, mars, jupiter, saturn), sun, moon, and motionless stars which were enclosed in spheres.
each of the five other planets were enclosed in four concentric circles. sun and moon are enclosed in three concentric spheres while the group of motionless stars lay in the outermost sphere.

Answer 10

Eudoxus’ Geocentric model