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KEPLER S LAW MCQs

Total Questions : 22 | Page 1 of 3 pages
Question 1. What causes Earth’s year to be shorter than Jupiter’s year?
  1.    the shape of Earth’s orbit around the Sun
  2.    the mass and density of Jupiter
  3.    the distance between Earth and the Sun
  4.    What causes Earth’s year to be shorter than Jupiter’s year?
 Discuss Question
Answer: Option C. -> the distance between Earth and the Sun
Question 2. Double the product of the masses of two objects
  1.    4 times weaker gravity force
  2.    2 times weaker gravity force
  3.    4 times stronger gravity force
  4.    2 times stronger gravity force
 Discuss Question
Answer: Option D. -> 2 times stronger gravity force
Question 3. What unit to we usually use to to measure a planet's orbital period?
  1.    year
  2.    astronomical unit
 Discuss Question
Answer: Option A. -> year
Question 4. What will result in the most eccentric elliptical orbit
  1.    when the focal points are on top of one another
  2.    then the focal points are farthest apart
  3.    when the focal points are closest together
  4.    All of above
 Discuss Question
Answer: Option B. -> then the focal points are farthest apart
Question 5. What is it called when earth reaches the point in orbit when it is farthest from the sun?
  1.    Perihelion
  2.    Aphelion
 Discuss Question
Answer: Option B. -> Aphelion
Question 6. Which model of the solar system can explain all observations
  1.    geocentric model
  2.    heliocentric model
 Discuss Question
Answer: Option B. -> heliocentric model
Question 7. What is the name of the backward motion of planets that cannot be explained by the geocentric model?
  1.    retrograde motion
  2.    revolutionary motion
 Discuss Question
Answer: Option A. -> retrograde motion
Question 8. Earth's spinning on its axis is called its _____________
  1.    orbit
  2.    rotation
 Discuss Question
Answer: Option B. -> rotation
Question 9. When a planet orbits the Sun, one of the foci of the elliptical orbit is
  1.    the axis
  2.    the perihelion
  3.    the center
  4.    the Sun
 Discuss Question
Answer: Option D. -> the Sun
Question 10. Kepler’s third law states
  1.    The semimajor axis is equal to the planet’s average distance from the sun
  2.    None of these answers is correct
  3.    The square of the orbital period of a planet is proportional to its orbital radius
  4.    The orbit of a planet around the sun is an ellipse, with the sun at one focus
 Discuss Question
Answer: Option C. -> The square of the orbital period of a planet is proportional to its orbital radius

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