About Keplers Law

Following are some of the multiple choice questions on the Keplers Law with answers that will help the students in developing their knowledge.

Keplers Law MCQ

3. What is inertia?

  • amount of atoms
  • amount of gravitational pull
  • the size
  • resistance to a change in motion

4. Who was Kepler?

  • Scientist
  • German Astronomer and mathematician

5. The period of geostationary artificial satellite is

  • 6 hours
  • 12 hours

6. The study of space

  • Astronomy
  • Meteorology
  • Galaxy
  • Geology

7. When the earth is closest to the sun

  • the sun will have the biggest apparent diameter and the greatest gravitational attraction
  • the sun will have the biggest apparent diameter and the smallest gravitational attraction

8. What is obliquity?

  • The measure of the tilt of the Earth
  • The change in the shape of Earth’s orbit around the sun
  • The change in the orientation of Earth’s axis
  • The measure of solar intensity of the sun

9. Planets revolve around the sun in elliptical orbits

  • Law of Periods
  • Law of orbits
  • Law of Areas

10. What is Kepler's 3rd Law?

  • Law of Areas

11. How fast does the earth revolve around the sun?

  • 15 degrees per hour
  • 1 degree per hour

12. What is the smallest terrestrial planet?

  • Mars
  • Venus
  • Mercury 
  • Earth

13. Who created the Universal Law of Gravitation?

  • Newton
  • Galileo

14. What is his nationality

  • Chinese
  • Turkish

15. What is Kepler's 1st Law?

  • Law of Areas

16. What is Kepler's 2nd Law?

  • Law of Orbits
  • Law of Periods

17. Which planet has the least eccentric orbit?

  • Venus
  • Mars

18. Which diagram shows a planet with the least eccentric orbit?

  • 1
  • 2
  • 3
  • 4

19. A wobble back and forth

  • Rotation
  • Nutation
  • Revolution

20. An ellipse is drawn around two points called

  • aphelion
  • perihelion
  • foci
  • axis

21. What did Kepler discover about planets and their orbital speed?

  • Planets with the greatest mass will orbit the Sun with the fastest orbital speed.
  • Planets furthest from the Sun will orbit with the fastest orbital speed.

22. Where will an object move at the greatest speed as it orbits the sun?

  • Aphelion

23. How can the position of the sun in earth's orbit be described?

  • The sun is at one of the two focal points of a slightly eccentric ellipse
  • The sun is at one of the two focal points of a highly eccentric ellipse

24. The areas swept by an invisible line between the sun an the earth will be

  • equal if the earth moves for the same amount of time
  • smaller if the earth moves for the same amount of time

25. What effect does increasing the distance between an ellipse’s foci have on the shape of an ellipse?

  • Increases eccentricity
  • no effect

26. What causes Earth’s year to be shorter than Jupiter’s year?

  • the shape of Earth’s orbit around the Sun
  • the mass and density of Jupiter

27. Which planet will take the least amount of time to revolve around the Sun?

  • Venus
  • Mars

28. Which planet will take the most amount of time to revolve around the Sun?

  • Venus
  • Mars

29. What unit to we usually use to to measure a planet's orbital period?

  • year
  • astronomical unit

30. Which of Kepler's Laws is illustrated here?

  • 1st Law
  • 3rd Law

31. The planet with the most eccentric orbit is

  • Venus
  • Mars

32. Which statement correctly describes when the earth is closest to the sun

  • It is called perihelion and it occurs on July 3rd
  • It is called aphelion and it occurs on July 3rd
  • It is called perihelion and it occurs on January 3rd

33. Earth will travel fastest in its orbit when

  • the earth is closest to the sun (January 3rd)
  • The earth is closest to the sun (July 3rd)

34. What is it called when earth reaches the point in orbit when it is farthest from the sun?

  • Perihelion

35. Which model of the solar system can explain all observations

  • geocentric model

36. Firs law of Kepler?

  • None
  • The orbit of planet is an ellipse with the Sun at one of the two foci
  • The radius vector of a planet sweeps over equal areas in equal time intervals of time.
  • The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit

37. Unit of 'G' is

  • N-m2/kg
  • N-m/kg2
  • N-m2/kg2
  • N-m/kg

38. 'G' is called

  • acceleration due to gravity
  • gravity
  • gravitational constant
  • gravitational force

39. When the distance between two objects increases the gravitational force between them

  • decreases
  • increases
  • no change

40. When the mass of the objects increases the gravitational force between them

  • decreases
  • increases
  • no change

41. In which position is Earth travelling fastest?

  • 1
  • 5
  • 7
  • 10

42. Who proposed Earth centered model?

  • Copernicus
  • Ptolemy
  • Kepler
  • Tycho Brahe

43. Types of celestial coordinate system

  • Latitude and longitude
  • Ecuatorial and horizontal
  • None

44. What family is he from?

  • His parents was poor
  • He didn't have a family

45. What is the second law of Kepler ?

  • All planets move around the Sun in elliptical orbits, with the Sun as one focus of the ellipse.
  • The square of the period of any planet is proportional to the cube of the semimajor axis of its orbit.

46. What is the third law of Kepler

  • The square of the period of any planet is proportional to the cube of the semimajor axis of its orbit.
  • None

47. What is the line connecting the sun and planet

  • Line
  • Area
  • Imagine
  • Radius vector

48. The factors that can determine the force between two objects include all of the following except

  • distance between the 2 objects
  • diameter of the objects

49. What is the reason for the motion of the moon on its orbit?

  • The gravitational force exerted by the sun
  • The gravitational force exerted on the Moon by the earth

50. What is the correct formula to calculate eccentricity?

  • Focal distance / major axis length
  • major axis length / minor axis length
  • minor axis length / major axis length

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