UNIVERSE
SOLAR SYSTEM FORMATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Gravitational and other forces held them together.
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High temperatures caused the particles to melt and clump together
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Cold temperatures caused the particles to freeze together
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The speed of the particles rotation was enough to keep them together
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Detailed explanation-1: -These planetesimals in turn form from much smaller particles. Why do these smaller particles stick together when they collide? Chemical bonds hold the particles together.
Detailed explanation-2: -Accretion is the process where small particles of dust, gas, and ice collect and stick together gradually. Gravity attracts these particles together, and they continue to accumulate to form a larger mass.
Detailed explanation-3: -Protoplanets are built up through the collisions of planetesimals over millions of years. The protoplanets orbit stably around the Sun for a while, but eventually they collide with each other. In about 100 million years, several terrestrial planets, like the ones found in our Solar System, are formed.
Detailed explanation-4: -In planetary science, accretion is the process in which solids agglomerate to form larger and larger objects, and eventually planets are produced. The initial conditions are a disc of gas and microscopic solid particles, with a total mass of about 1% of the gas mass.
Detailed explanation-5: -These particles crash into one another, converting their kinetic energy into thermal energy. SPINNING: Like an ice skater pulling in her arms as she spins, the solar nebula rotates faster and faster as it shrinks in radius. This increase in rotation rate represents conservation of angular momentum.