History of Life on Earth

Question 1

How long ago was the beginning of Earth thought to be?

Answer 1

4.55 Billion years ago

Question 2

List all of the Eons in order from oldest to youngest.

Answer 2

Hadean, Archaean, Proterozoic, Phanerozoic.

Question 3

List all of the Eras in the Phanerozoic Eon in order from older to newest.

Answer 3

Paleozoic, Mesozoic, Cenozoic.

Question 4

List all of the periods in the Paleozoic Era from oldest to newest.

Answer 4

Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian.

Question 5

List all of the periods in the Mesozoic Era from oldest to newest.

Answer 5

Triassic, Jurassic, Cretaceous.

Question 6

List all of the periods in the Cenozoic Era from oldest to newest.

Answer 6

Tertiary, Quaternary.

Question 7

What Eons make up the precambrian?

Answer 7

Archaean and Proterozoic

Question 8

List all 5 Mass Extinctons.

Answer 8

End of the Ordovician, Devonian, Permian, Triassic, and Cretaceous periods.

Question 9

What type of rock are fossils usually made of?

Answer 9

Sedimentary Rocks