Universe & Solar System Section 1 Practice Questions Answers Test With Solutions & More Shortcuts

Answer: (b)

The simplest model for the shape of the entire Earth is a sphere. The Earth’s radius is the distance from Earth’s center to its surface, about 6,371 kilometers (3,959 mi).

Earth is only approximately spherical, so no single value serves as its natural radius. Since the Earth is flattened at the poles and bulges at the equator, geodesy represents the shape of the earth with an oblate spheroid.

The oblate spheroid, or oblate ellipsoid, is an ellipsoid of revolution obtained by rotating an ellipse about its shorter axis.

Answer: (d)

The nearness of Mercury to the massive gravity influence of the Sun is the likely reason that no natural satellites are present, although it is possible that one or more may have existed in the past.

Answer: (a)

Answer: (c)

The sky looks black from the space. In space, sunlight or any kind of star light does not have anything from which to bounce off.

Answer: (d)