Which of the following is true of Galileo Galilei?

Which of the following is true of Galileo Galilei?
 
  A) He invented the telescope.
  B) He publically defended the geocentric model of the Universe.
  C) He was the first person to look at the sky through a telescope.
  D) He applied his careful observations of the sky to determine the place of Earth.

Question 2

Kepler's first law of planetary motion implies that:
 
  A) the planets move at constant speeds at all points in their orbits.
  B) all the planets move around Earth in elliptical orbits.
  C) uniform circular motion is adequate to describe the motion of all the planets.
  D) the planets move in elliptical orbits around the Sun.

Question 3

The diagram below shows three approximate locations of the sun along the western horizon. Which number indicates the location of the sun at sunset on June 21 for an observer at a latitude of 77 N?
 
 
  a. 1
  b. 2
  c. 3
  d. The sun will not rise for an observer in the northern hemisphere.
  e. The sun will not set on June 21 at this latitude.

Question 4

Which of the following is true of the Ptolemaic model of the Universe?
 
  A) It predicted the positions of the planets with fair accuracy at first.
  B) It went against Aristotle's beliefs of the Universe.
  C) It strengthened the first principles of Aristotle.
  D) It placed Earth at the exact center of the Universe.

Question 5

The occasional backward motion of the planets against the background of fixed stars is called _____.
 
  A) anterograde motion
  B) rotation
  C) oscillation
  D) retrograde motion