Answer:
collapse, condensation and accretion
Explanation:
According to the nebula hypothesis all the bodies in our solar system began as a giant cloud of molecular gas and dust, something happened about 4.57 billion years ago which caused the cloud to collapse (collapse).
After the collapse pockets of dust and gas came together to form denser regions (condensation). this denser regions pulled in more matter and conservation of momentum caused it to begin rotating and then heating up due to increasing pressure. Most of the material ended up in a ball around the center which and the rest of the matter flatten out into disk (protoplanetary disc) around it (accretion).
