Early Earth History

Question 1

The Precambrian time period is segmented into very few parts because:

Revolt · Accepted Answer

the fossil record is scarce

Question 2

Cyanobacteria increased the levels of carbon dioxide in the atmosphere.

Revolt · Accepted Answer

F

Question 3

Life-forms that existed during the Paleozoic Era included ____.

Revolt · Accepted Answer

all of the above

Question 4

The Precambrian time period is the largest on the geological time scale.

Revolt · Accepted Answer

T

Question 5

Early land animals had to return to the water to reproduce.

Revolt · Accepted Answer

T

Question 6

A life-form in the Precambrian time was ____.

Revolt · Accepted Answer

cyanobacteria

Question 7

Early land animals had gills as well as lungs.

Revolt · Accepted Answer

T

Question 8

Geologic events that occurred during the Paleozoic Era include mountain building and volcanic activity.

Revolt · Accepted Answer

T

Question 9

The geological time scale is divided up and organized according to what life forms existed on earth.

Revolt · Accepted Answer

T

Question 10

The development of ____ factored in the development of complex organisms.

Revolt · Accepted Answer

all of the above

Early Earth History Answers