6. Which of the following information describes Mercury?
A. It is 4,879 km in diameter.
B. It is 6,794 km in diameter.
C. It is 12,756 km in diameter.
D. It is 12,104 km in diameter.
7. Which of the following is NOT true about terrestrial planets?
A. Terrestrial planets have rings.
B. Terrestrial planets are also called inner planets.
C. Terrestrial planets are the four planets closest to the sun.
D. Terrestrial planets are the four planets made of solid rocks.
8. Why is the length of a day different from planet to planet?
A. It is because they rotate at the same time.
B. It is because they have different periods of rotation.
C. It is because they have different periods of revolution.
D. It is because they have the same periods of revolution.
9. Which of the following statements describes terrestrial planets?
A. Terrestrial planets are also called Jovian planets.
B. Terrestrial planets are also called Earth-like planets.
C. Terrestrial planets are the four planets farthest from the sun.
D. Terrestrial planets are the largest planets in the solar system.
10. Why does it take lesser time for Earth to revolve around the sun than
Mars?
A. It is because Earth is larger than Mars.
B. It is because Earth has a thicker atmosphere than Mars.
C. It is because of the difference in their distance from the sun.
D. It is because Mars have greater number of moons than the Earth.

pls real answer