Question

Key concept: our cosmic origins learning goal: to understand the order and approximate timing of major cosmic events that have made it possible for us to be here today. part a - ranking task consider the indicated events in the history of the universe that have helped make human life possible. rank the events based on when they occurred, from longest ago to most recent. to rank items as equivalent, overlap them. note: if two events occurred within seconds of each other, rank them as equivalent.

Answer 1

This is the occurrence that had happened in order:
- the Big Bang and the universe begins to expand
- elements such as carbon and oxygen first exist
- nuclear fusion begins in the Sun
- earliest life on Earth
- dinosaurs go extinct
- earliest humans