universe & solar system section 9 MCQ Questions & Answers Detailed Explanation

Answer: (d)

Space between Earth and Moon is known as Cislunar. Pertaining to the space between the earth and the orbit of the moon.

Answer: (c)

According to the Nova hypothesis, Solar planets were formed because of the explosion of Super Nova. A star becomes Super Nova in that stage when it has lacks hydrogen elements. A supernova happens where there is a change in the core, or center, of a star.

A change can occur in two different ways, with both resulting in a supernova. The first type of supernova happens in binary star systems. Binary stars are two stars that orbit the same point. One of the stars, a carbon-oxygen white dwarf, steals matter from its companion star. Eventually, the white dwarf accumulates too much matter. Having too much matter causes the star to explode, resulting in a supernova. The second type of supernova occurs at the end of a single star’s lifetime. As the star runs out of nuclear fuel, some of its mass flows into its core.

Eventually, the core is so heavy that it cannot withstand its own gravitational force. The core collapses, which results in the giant explosion of a supernova. The sun is a single star, but it does not have enough mass to become a supernova.

Answer: (c)

In physics, radiation is a process in which energetic particles or energetic waves travel through a vacuum, or through matter-containing media that are not required for their propagation. The Earth receives 174 petawatts (PW) of incoming solar radiation (insolation) at the upper atmosphere.

Answer: (d)

The black part of the moon is called sea of tranquility. Sea of tranquility is not an actual sea but rather the point at which Apollo 11 first landed when it reached the moon.

It is a lunar mare that mainly consists of basalt rock and is located on the Tranquillitatis basin which is on the Moon. The mare has a tint that is slightly blue in color and stands out from the rest of the moon.

Answer: (d)

Answer: (b)

The Equator is an imaginary line of latitude that circles the globe in an east-west direction. It lies exactly midway between the North and South poles. It forms a plane that runs perpendicular to the earth’s axis.