Exam 12: Earths Evolution Through Geologic Time

______are the dominant land plants of the Cenozoic era.

Mammals became the dominant land animals during the ______ era.

The supercontinent of Pangaea began to break up during the______ era.

During the process of ______, plants release oxygen.

During the early Paleozoic era, the continent of Gondwanaland included

Scientists have found evidence that life existed at least 3.5 billion years ago______ .

The large outer planets Jupiter, Saturn, Uranus, and Neptune contain huge amounts of______ and other light materials as part of their composition.

The first true terrestrial land animals were the ______.

Which of the following is not a hypothesis for how life began?

In Rodinia, a well- documented Precambrian supercontinent, ______.

At the start of the Paleozoic, North America ______ .

The Goldilocks scenario suggests that ______.

Most ______rocks are devoid of fossils; consequently this is the least understood span of Earth's history.

Following the reptilian extinctions at the close of the Mesozoic, two groups of mammals, the marsupials and______ , evolved.

The first fully land- based animals were______.

During the Cambrian, Trilobites developed a flexible exoskeleton which allowed them to .______

The heaviest element produced by nuclear fusion in a young star is______ .

Earth formed approximately______ years ago.

Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option that does not fit the pattern.

Sea level is constant over long periods of the earth's history, and that makes it ______as a major datum for mapping elevations.