What is accretion, and how did it form the Earth?
When matter come together to form larger bodies
Accretion: the coming together and cohesion of matter under the influence of gravitation to form larger bodies.
After the Sun was formed, the remaining gas and rocks and ice and stuff spun around the Sun began to clump up(accretion). Bounded by increasing gravity, larger and heavier celestial bodies formed, one such body became what is now known as Earth.