Question

The inner planets—Mercury, Venus, Earth, and Mars—are believed to have been formed by _____. masses of cold hydrogen and helium collisions with large galaxies the combining of asteroid-sized debris the explosion of supernovas

Answer 1

Repeated collisions of asteroid-sized debris

Answer 2

The inner planets—Mercury, Venus, Earth, and Mars—are believed to have been formed by the explosion of supernovas.

Step-by-step explanation:

The planets in the solar system are of two types, the inner planets, and the outer planets. The planets which are closest to the sun are classified under inner planets. The inner planets are Mercury, Venus, Earth, and Mars. These planets are made up of rocks and metals. They are small in size and denser too.