GENERAL KNOWLEDGE

GK

SOLAR SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The planets of the solar system formed as
A
the center of the gas cloud cooled
B
planetesimals flattened into a rotating disk
C
planetesimals collided into one another and “stuck together”
D
the sun absorbed extra gas and dust from the solar system
Explanation: 

Detailed explanation-1: -Over time the planetesimals continued to collide and join together, attracted by gravity. These larger objects, about the size and mass of our Moon, are called protoplanets.

Detailed explanation-2: -For planetesimals large enough not to be affected by nebular gas (R > 10 km), the most important force involved in collisions is gravity.

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