How does accretion work?

Answer 1

accretion occurs when two plates collide. when an oceanic plate dives beneath a continental plate, there is a layer of sedimentary rock from the oceanic plate that is less dense and instead of diving below with the rest of the plate it gets slammed onto the continental plate. This is how continents grow in size. Accretionary wedges are often vertical, since the horizonal layers got thrust against the continent and got tilted.

Answer 2

"Accretion" basically means "gathering together", In many places in our galaxy, a telescope reveals new stars emerging from huge and dense clouds of interstellar gasses. The gravity of these new stars will attract large amounts of gas around them. The gasses will orbit the new star. This whirling, orbiting cloud will start to have "chunks" of the gas and dust within the gas "stick together". The larger these clumps become, the more gas and dust they attract. Eventually they coalesce into planetary object, or gas giants, or if enough gas collects around them (which happens much more frequently than most people realize) they also become stars, and form a "dual" (or triple, or quadruple) star system. All because of the principle of accretion.

Answer 3

That's when something gets bigger as its gravity grabs matter from space.

Answer 4

Accretion is the act of something increasing by natural growth, or the act of increasing of items by external means.

Answer 5

"Accretion" means that they clump together.