Question

The inner planets mercury, Venus, earth, and mars were formed by

Answer 1

• About some billion years ago, dust and gas particles began orbiting around the sun.

• These particles then began to stick together and formed large particles. Slowly, these particles began attracting more mass with their gravity.

• After millions of years, these particles became planetesimals. They started revolving around the sun in their own orbit and formed spherical shapes.

• This continued for another millions of years and thus planets were formed.

Step-by-step explanation:

• The inner planets are the four planets that are closest to the sun. The inner and outer planets are separated by asteroid belts.

• The "inner planets are terrestrial" and rocky whereas the "outer planets" are mostly gas.