Exam 12: Earths Evolution Through Geologic Time

What group of animals were the first to leave the ocean to become the first amphibians?

Following the reptilian extinctions at the close of the Mesozoic era, two groups of mammals, the marsupials and ______ , evolved and expanded.

Planets in the making are referred to as ______.

Zircons found in continental rocks give evidence that continental crust was forming as long ago as ______.

The beginning of the ______is marked by the appearance of the first life forms with hard parts.

What would have happened if Earth were located 10% further out from the Sun?

Evidence that Gondwana formed near the South Pole include ______.

The ______period was the "golden age of trilobites."

When Earth's primitive surface cooled below water's boiling point, torrential rains slowly filled low areas, forming ______ .

By the close of the Paleozoic, all the continents had fused into the single super continent of______ .

Which one of the following represents the greatest expanse of geological time?

The Laramide Orogeny at the end of the Mesozoic produced ______.

Planetesimals, asteroid- size objects, form during the early history of the solar nebula due to ______.

One significant difference between oceanic and continental crust in terms of the long term evolution of Earth's surface is that______.

The ______era is the age of mammals.

Early Earth was hot because ______.

At the start of the Mesozoic, the climate was______ .

According to your text, which type of body would have looked similar to the photograph below in its early history?

The beginning of the Phanerozoic is marked by the______ .

A major obstacle the first land plants had to overcome was______ .