Exam 22: Earths Evolution Through Geologic Time

Which of the following elements would have been the first to form after the formation of the universe?

Why did invertebrates, particularly arthropods, get so large in the Late Paleozoic?

What affect would the formation of a supercontinent have on the climate of this landmass?

The earliest fossil evidence of life is in the form of ________.

In what geologic time period would the mammoth in this image have existed?

Which group of animals will bear live young that are underdeveloped and must stay in the mother's pouch to complete their development?

Flying reptiles such as the Archaeopteryx led to the evolution of ________.

The ________ refers to a huge expansion in biodiversity 530 million years ago, which also marks the first appearance of invertebrate organisms.

For how long were dinosaurs the dominant species on the Earth?

What event was responsible for the extinction of the dinosaurs?

What period had the greatest amount of cratonic formation?

The ________ of a continent consists of Precambrian rocks of the craton covered by a thin mantle of sedimentary rocks.

What is the importance of cyanobacteria for our atmosphere? What did they produce and how? What happened to the first materials they produced?

Flying reptiles are a form of dinosaur.

The dominant plant group during the Mesozoic Era was ________.

The Navajo Sandstone, such as that exposed at Zion National Park in Utah, is evidence of a ________ environment during the Jurassic Period in the western United States.

What geologic process triggered the Permian Extinction? Where did the trigger occur?

The acidity levels of the early oceans were much lower than today, so it took 4 billion years of weathering in order to reach the level of salinity present in the oceans today.

The Geologic Time Scale records the history of Earth all the way back to the formation of the universe.

What were the first animals to leave the sea and adapt to a terrestrial environment? When did they do so? What physiological properties did they have that made them able to do so?