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Kepler's Law MCQ Science

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About Kepler's Law

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

Kepler's Law MCQ

1. What is inertia?

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

2. A year on Jupiter is 4,344 days long. This tells you how long it takes

Jupiter to rotate one time on its axis.
Earth to orbit Jupiter.
Jupiter to orbit the sun
the sun to orbit Jupiter

3. Who was Kepler?

Scientist
German Astronomer and mathematician

4. The period of geostationary artificial satellite is

6 hours
12 hours
24 hours
48 hours

5. Earth's spinning on its axis is called its _____________.

orbit
rotation

6. The study of space

Astronomy
Meteorology
Galaxy
Geology

7. Kepler’s third law states

The semimajor axis is equal to the planet’s average distance from the sun
None of these answers is correct
The square of the orbital period of a planet is proportional to its orbital radius
The orbit of a planet around the sun is an ellipse, with the sun at one focus

8. 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

9. 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

10. When a planet orbits the Sun, one of the foci of the elliptical orbit is

the axis
the perihelion
the center
the Sun

11. Planets revolve around the sun in elliptical orbits

Law of Periods
Law of orbits
Law of Areas
None of these

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

15 degrees per hour
1 degree per hour
1 degree per day
15 degrees per day

13. What is Kepler's 3rd Law?

Law of Areas
Law of Periods
Law of Orbits
None of these

14. What is his nationality

Chinese
Turkish
German
Russian

15. Which planet has the least eccentric orbit?

Venus
Mars
Earth
Mercury

16. What is Kepler's 2nd Law?

Law of Orbits
Law of Periods
Law of Areas
None of these

17. What is Kepler's 1st Law?

Law of Areas
Law of Periods
Law of Orbits
All of above

18. Unit of 'G' is

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

19. 'G' is called

acceleration due to gravity
gravity
gravitational constant
gravitational force

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

decreases
increases
no change
None of these

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

decreases
increases
no change
Both A & B

22. Who proposed Earth centered model?

Copernicus
Ptolemy
Kepler
Tycho Brahe

23. Types of celestial coordinate system

Latitude and longitude
Ecuatorial and horizontal
None
All of above

24. What family is he from?

His parents was poor
He didn't have a family

25. 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.
The radius vector of a planet sweeps over in equal areas in equal intervals of time.
None of these

26. 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

27. What is the line connecting the sun and planet

Line
Area
Imagine
Radius vector

28. 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

29. The accelerations due to gravity on the surfaces of two planets are equal in magnitudes if

massradius\frac{mass}{radius}radiusmass
massradius3\frac{mass}{radius^3}radius3mass

30. If r represents the radius of the orbit of a satellite of mass m moving round a planet of mass M the velocity of the satellite is given by

v2 = GMmrv^2\ =\ \frac{GMm}{r}v2 = rGMm
v2 = gMRv^2\ =\ \frac{gM}{R}v2 = RgM
v=\frac{GMm}{r^2} v= r 2 GMm
V= ( r GM )

31. 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

32. 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
All of above

33. 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

34. Where are the focal points located in a perfect circle?

close together
on top of each other

35. What will result in the most eccentric elliptical orbit

when the focal points are on top of one another
then the focal points are farthest apart
when the focal points are closest together
All of above

36. What is the name of the backward motion of planets that cannot be explained by the geocentric model?

retrograde motion
revolutionary motion

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

geocentric model
heliocentric model

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

Perihelion
Aphelion

39. 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)

40. 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
None of these

41. The planet with the most eccentric orbit is

Venus
Mars
Earth
Mercury

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

year
astronomical unit

43. 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
the distance between Earth and the Sun
What causes Earth’s year to be shorter than Jupiter’s year?

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

Increases eccentricity
no effect

45. 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

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

Aphelion
Between perihelion and aphelion
Perihelion
None of these

47. 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.
Planets closest to the Sun will orbit with the fastest orbital speed.
Planets with the least mass will orbit the Sun with the fastest orbital speed.

48. Double the distance between two objects

4 times greater gravity attraction
2 times weaker gravity
4 times weaker gravity attraction
2 times greater gravity

49. Double the product of the masses of two objects

4 times weaker gravity force
2 times weaker gravity force
4 times stronger gravity force
2 times stronger gravity force

50. Which of the following can decrease the gravity between objects?

Remove mass
Decrease distance

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