universe & solar system section 11 MCQ Questions & Answers Detailed Explanation

Answer: (d)

On the equator, the day and night stay approximately the same length all year round.

Answer: (d)

Longitude is measured in degrees East or West of the Prime Meridian.

Answer: (b)

A nebula is an interstellar cloud of dust, hydrogen, helium, and other ionized gases. Originally, nebula was a name for any extended astronomical object, including galaxies beyond the Milky Way.

The Andromeda Galaxy, for instance, was referred to as the Andromeda Nebula before galaxies were discovered by Edwin Hubble.

Answer: (c)

1. A prime meridian is a meridian (a line of longitude) in a geographical coordinate system at which longitude is defined to be 0°. A prime meridian and its opposite in a 360°-system, the 180th meridian (at 180° longitude), form a great circle. This great circle divides the sphere, e.g., the Earth, into two hemispheres.
2. The Tropic of Cancer also referred to as the Northern Tropic, is the most northerly circle of latitude on the Earth at which the Sun may appear directly overhead at its culmination.
3. The International Date Line (IDL) is an imaginary line of longitude on the Earth’s surface located at about 180 degrees east (or west) of the Greenwich Meridian.
4. Arctic Circle is an imaginary circle around the earth, parallel to the equator, at latitude66° 32' N; it marks the northernmost point at which the sun appears above the level of the horizon on the winter solstice.
5. Tropic of Capricorn is the parallel of latitude that is approximately $23 1/2$ degrees south of the equator and that is the southernmost latitude reached by the overhead sun 40.

Answer: (a)

Answer: (a)

Venus is sometimes called as Earth's twin planet, in terms of size and composition. Like the earth, Venus is covered with thick clouds and has an atmosphere.