Exam 11: A Biography of Earth

Dinosaurs first appeared during the ________ Period.

Earth is approximately how old?

The first supercontinent,Rodinia,formed at the end of the ________.

Of the major orogenies that formed the Appalachian Mountains,the ________ orogeny formed when North America and Africa collided.

The heavy bombardment was a time in which Earth was struck by many ________,which added ________ and kept the surface from cooling.

Oxygen in Earth's atmosphere is derived from ________.

List the major orogenies that formed the Appalachian Mountains in eastern North America.Then explain which orogeny likely produced the largest mountain range,and why.

Cells that have a nucleus are called ________ life.

After Rodinia separated,North America was included on the continent of ________.

Rocks containing many of the earliest examples of evolving life are found in the ________ of North America because they were formed in shallow ________ seas.

The first pieces of true continental crust formed in the ________ Eon.

Why did banded iron formations form between 2.4 and 1.8 Ga?

Describe how fossils can be used to interpret the geologic history of an area.

Where would you go today if you wanted to see a piece of the earliest continental crust?

According to the graph below,continental crust was mostly done forming by ________.