11. What is the major contribution of Tycho Brahe to the field of astronomy?
A. the invention of telescope
B. the Earth's axis of rotation
C. measurement of Earth' circumference
D. accurate measurement of stars' and planets' position
12. Below is Brahe's model of the universe. Based on the figure, which of the following statements
bests describe Brahe's model?
A. The planets except Earth revolve around the Sun, while the moon and the Sun revolve around
the Earth.
B. The Sun and the Earth are both at the center and the other planets revolve around it.
C. The planets except Earth revolve around the Sun, while the moon revolves around the Earth.
D. Neither the Sun nor the Earth is at the center and the other planets do not revolve around it.
13. Based on Kepler's First Law, which of the figures below describes the path of a
planet as it moves around the Sun ?
A.
B.
C,
D.
A
14. Kepler discovered that planets do not go around the Sun at a uniform speed but it depends on it
position relative to the Sun. What is its speed when it is farther from the Sun?
A. faster
C. neither fast nor slow
B. slower
D. similar to the speed when it is closer
to the Sun
15. What relationship between the times of revolutions of the planets and their distance
from the Sun did Kepler discover?
A. The cube of the times of revolution of the planets are proportional to the
square of their average distance from the Sun.
B. The cube of the times of revolution of the planets are not proportional to the