Geoloical time

Question 1

What are the four Eons in chronological order?

Answer 1

Hadean, Archean, Proterozoic, Phanerozoic

Question 2

How old is earth?

Answer 2

4.6 Billion years

Question 3

What is a the difference between an eon and an era?

Answer 3

An eon is the largest division of geological time and an era is a subdivision.

Question 4

What happened in the Hadean Eon?

Answer 4

Formation of the earth

Question 5

What happened in the Archean Eon?

Answer 5

The Earth’s crust started to cool down and continents started to form

Question 6

What happened in the Proterozoic Eon?

Answer 6

sea creatures and microorganisms started to form

Question 7

What happened in the Phanerozoic Eon?

Answer 7

More complex creatures formed like wildlife up to the formation of mankind.

Question 8

what are the Largest to smallest hierarchical units?

Answer 8

Eons, Eras, periods, epochs

Question 9

What is the new eon that scientists believe that we are living in.

Answer 9

Anthropocene

Question 10

What is the evidence for the new eon, that we are living in?

Answer 10

plastic pollution, increased carbon dioxide levels, and loss of biodiversity.