You are going to design a clock to represent the different geologic eons throughout Earth's history. Here are the steps you need to take to complete your geologic time scale clock:
Research how long each eon lasted. You also might want to include the three eras of the most recent eon.
Knowing that each hour of the clock is about 375 million years, determine how many hours each eon takes up on our 12-hour clock. For example, if an eon took 750 million years, that would take up two hours of the clock.
Within each eon, identify major events and the types of life that dominated the earth during that time.
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Answers & Comments
The earth is about 4,600 million years old.
Life first appeared 1,500 years later
At 4060 the first land animals appeared Cambrian era started
225 million years ago Triassic - mammals appeared
55 Paleocene -- apes
350,000 years - humans
10,000 recent human civilization
You have to work out how many hours (or minutes) to each division
Those instructions sound pretty complete to me. Go and do it.