MHS Geology - Module 18 - Geologic Time Scale

How are mammals distinct from reptiles?

Which is NOT true about the rift that developed between Eastern US and western Africa in the late Triassic?

Why do scientists think that birds evolved from dinosaurs?

What are the group of plants called that produce flowers and have seeds with a protective outer coat?

Why did many plants die at the end of the Mesozoic Era?

Laurasia was made up of which modern continents?

Free oxygen in Earth's atmosphere can be attributed to what source?

Which mountain range did not form during the Cenozoic period?

Mammals of the Cenozoic increased in size, developed specialized limbs & teeth, and had body hair.

Grasses are angiosperms that evolved during the Cenozoic because they survive in cooler and drier environments.

What did Milankovitch propose as the main cause of ice ages?

Which animals did NOT survive the Mesozoic extinction?

One group of reptiles, characterized by the fossil Archaeopteryx, led to the evolution of

During which time period did the first dinosaurs and first mammals evolve?

Many new groups of organisms evolved in a relatively short time in an event called the

According to the Precambrian rock record, much of Earth's first free oxygen combined with

What likely contributed to the extinction that marks the end of the Mesozoic Era?

Earth's original atmosphere was made up of gases similar to those

The most common Precambrian fossils are layered mounds of calcium carbonate called

How did Earth's oceans form?

What happened to all the continents by the close of the Paleozoic?

The current geologic period is called the

What caused many events of mountain building in western North America, Europe, and Asia

Which span of geologic time covers the majority of Earth's history?

In the early Paleozoic, life was restricted to the

During the early Paleozoic era, what was the name of the Southern continent?

Which period is knows as the "Age of Fishes"?

During the Carboniferous period, large swamp forests extended across tropical regions, eventually forming..

Which of the following made it difficult for geologists to learn about Precambrian time?

Which of the following gases was NOT part of Earth's original atmosphere?

As the North American plate overrode the Farallon plate, what began to form?

Which title best describes the current geologic age?

Which era immediately follows the Precambrian?

What are the group of plants called with seeds that lack a protective outer coat?

Some continents contain large core areas of Precambrian rocks at the surface called

What important event in animal evolution marks the beginning of the Cambrian?

Mammals became widespread and abundant only after

Which of the following statements is true?

Which 2 periods, formerly known as the Tertiary period, make up nearly all of the Cenozoic era?

Why did amphibians diversify so rapidly during the late Paleozoic?