Stars and the Solar System Test - 10

Asteroids are a part of the solar system along with the eight planets. Like the planets, they too revolve around the Sun. Asteroids are celestial bodies composed of rocks and metals. Their orbit lies between the orbits of Mars and Jupiter. Mars is the outermost planet of the inner planets and Jupiter is the innermost planet of the outer planets.

The correct answer is C.

Meteors enter the Earth’s atmosphere at very high speeds. Their speed is opposed by the gas molecules present in the atmosphere. This opposition of the motion of the meteors is the friction caused by the atmosphere. It is this friction that heats up the meteors and causes them to evaporate quickly.

The correct answer is C.

Along with the eight planets, asteroids are also present in the solar system. They are celestial bodies composed of rocks and metals. They revolve around the Sun. Their orbit lies between the orbits of Mars and Jupiter. They are far away from the Earth. These cannot be seen through the naked eye and can be observed only through large telescopes.

Meteors form bright streaks along their paths. Asteroids do not leave bright streaks.

The correct answer is D.

The time period between one full moon and the next full moon is approximately 29 days. This means that the next full moon will occur on the 29^th day starting from the full moon day. There are 28 days between one full moon and the next full moon. A full moon appears on Sunday. It will be Sunday on the 28^th day. Therefore, the next full moon will appear on Monday the 29^th day.

The correct answer is A.

The surface of moon is not smooth. It has many craters and rocks of different sizes. Some rocks are as high as the mountains on Earth. Hence, statement I is correct.

Moon’s surface is devoid of water. It does not have any water bodies. Hence, statement II is incorrect.

Moon appears luminous because it reflects sunlight. It does not emit its own light. Hence, statement III is incorrect.

The correct answer is A.

Vegetation is found only in the presence of atmosphere and water. Since there is no atmosphere and water on the surface of the moon, vegetation does not exist.

The correct answer is D.

Stars are present in the sky at all times. During the day, stars are not visible in the sky because of the bright sunlight.

The correct answer is C.

The density of Saturn is 0.69 g/cm³ while the density of water is 1g/cm³. Hence, Saturn is less dense than water.

The correct answer is D.

The outermost planet of the inner planets is Mars. The innermost planet of the outer planets is Jupiter. The orbit of Mars is the closest to the orbit of Jupiter. The asteroid belt separates the orbits of the two planets.

The correct answer is D.

Uranus is the third member of the outer planets. It rotates from East to West while the Earth rotates from West to East.

The correct answer is C.

Kalpana-1 is India’s first meteorological satellite. It was launched on the 12^th of September, 2002; 27 years after the launch of Indian’s first artificial satellite- Aryabhatta.

The correct answer is C.

The plane which contains the equator is called equatorial plane. The plane in which the earth revolves around the sun is called orbital plane. The orbital plane is inclined at an angle of 23.5° toward the equatorial plane.

The correct answer is A.

Compared to the moon, artificial satellites are much closer to the Earth. Their orbits lie at a distance of between 600 km and 36000 km from the Earth. The orbit of the moon is at a distance of 3.84 × 10⁵ km from the Earth. Hence, statement II is incorrect.

Till now, there is no device that has been developed to predict earthquakes. Hence, prediction of earthquakes is not possible through artificial satellites. Therefore, statement III is incorrect.

The correct answer is D.