THE GEOLOGIC TIME SCALE

Question 1

It is the record of the life forms and geological events in Earth’s history. Scientists developed the time scale by studying rock layers and fossils world wide. Radioactive dating helped determine the absolute divisions

Answer 1

Geological Time Scale

Question 2

4 Major Divisions of the Geologic Time Scale

Answer 2

Eons (largest) > Eras > Periods > Epochs (smallest)

Question 3

What time did the Geological Time Scale begins that covers the approx. 88% of the Earth’s History?

Answer 3

Precambrian Time

Question 4

Give One Super Eon and the 3 Eras

Answer 4

PRE-CAMBRIAN Super Eon, Paleozoic (Ancient Life), Mesozoic (Middle Life), and Cenozoic (Recent Life)

Question 5

Era that is 544 million years ago and lasted 300 million yrs

Answer 5

Paleozoic Era (Ancient Life)

Question 6

Era that is 245 million years ago and lasted 180 million yrs

Answer 6

Mesozoic Era (Middle Life)

Question 7

Era that is 65 million years ago and continues through present day

Answer 7

Cenozoic Era (Recent Life)