universe & solar system section 7 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (d)

The black part of the moon is called the 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 Tranquilitatis 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: (b)

Eclipse of the moon occurs when the moon comes between the sun and the earth and it causes the shadow of the moon to fall on earth. A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow).

This can occur only when the Sun, Earth, and Moon are aligned (in “SYZYGY”) exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can only occur the night of a full moon.

Answer: (d)

Greenwich Mean Time is the standard time for time assessment in different countries of earth. The countries which lie east of the Greenwich line are ahead of Greenwich Mean Time while the countries which lie west of Greenwich have their standard time behind the Greenwich Mean Time.

So, the correct sequence of the countries are Japan, Iraq, Greece, Cuba and Costa Rica.

Answer: (b)

The group of small pieces of rocks revolving round the sun between the orbits of mars and Jupiter are called Asteroids.

Answer: (a)

At the time of the solar eclipse, it is not the shadow of the earth that is visible on the surface of the sun.

The solar eclipse occurs when the moon comes between the sun and the earth. The shadow of the earth is visible during the lunar eclipse.