Solar System NDA Questions

NDA World Geography

Solar System MCQ Questions


7.
According to Kepler's First Law of Planetary Motion, the orbit of a planet around the Sun is which shape?
A.
A spiral
B.
A perfect circle centered on the Sun
C.
An ellipse with the Sun at one focus
D.
A parabola
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ANSWER :
C. An ellipse with the Sun at one focus
8.
Kepler's Second Law states that a line joining a planet and the Sun sweeps out equal areas in equal intervals of time. This implies that a planet moves fastest when it is:
A.
At a fixed constant speed throughout
B.
Closest to the Sun (at perihelion)
C.
Exactly midway in its orbit
D.
Farthest from the Sun (at aphelion)
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ANSWER :
B. Closest to the Sun (at perihelion)
9.
Kepler's Third Law (Law of Harmonies) relates a planet's orbital period to which other quantity?
A.
The semi-major axis of its orbit (distance from the Sun)
B.
Its number of moons
C.
Its axial tilt
D.
Its mass
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ANSWER :
A. The semi-major axis of its orbit (distance from the Sun)
10.
Which is the largest planet in the Solar System, both by mass and volume?
A.
Jupiter
B.
Uranus
C.
Neptune
D.
Saturn
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ANSWER :
A. Jupiter
11.
Which is the smallest planet in the Solar System?
A.
Pluto
B.
Mercury
C.
Venus
D.
Mars
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ANSWER :
B. Mercury
12.
Which planet is the hottest in the Solar System, despite not being the closest to the Sun?
A.
Mercury
B.
Jupiter
C.
Mars
D.
Venus
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ANSWER :
D. Venus