Answer:
3. one of the rocky planets
4. True
5. closest planet to sun
6. Most of them lie in a belt between Earth and Mars.
7. Planet A orbits faster than Planet B.
8. Saturn
Explanation:
3. Jupiter is the fifth planet of the solar system. It is the largest Jovian planet made of gases such as hydrogen. It has 79 known moons. The great red spot is a largest cyclone present on it which as big as two Earths'.
It is a gaseous planet and not a rocky one.
4. The shape of the orbit of a planet depends on the gravitational pull. The balance between the forward motion of planets and the gravitational pull of other planets and star determines the orbit. Thus, the given statement is true.
5. Mercury is the closest planet to Sun. Venus is the second planet from the Sun. It has very thick atmosphere which makes it the hottest planet of the solar system as the sun heat gets trapped in its thick atmosphere mostly made up of carbon-dioxide. Venus has no moons. It has a rocky surface.
6. Asteroids are the irregular sized and shaped bodies present in the solar system which orbit the sun. Most the asteroids are present between the orbits of Mars and Jupiter. These are thought to be remains of the planet which could never be formed between Mars and Jupiter.
7. From Kepler's law, we understand that the planets closer to the star have smaller orbital period i.e orbit faster than the planets which are farther. Thus, planet A which closer to the star would have shorter orbital period and faster orbital speed.
8. According to the given chart, Saturn contains most of the hydrogen gas. Saturn is a gaseous planet. It has so low density that it can even float on water. It is composed of hydrogen gas and metallic hydrogen. It is surrounded by a ring system.
