Geologic time

What can we learn from fossils?

What period during the Paleozoic Era was labeled the Age of Fishes?

What ERA was labeled the Age of Reptiles?

These are the most common types of fossils

The relative age of rock is:

During the Precambrian Era, most of the life was:

What was the first ERA in Earth's geologic history?

The first fossil can be dated back to this time period.

The relative age of rock is

The last period in the Mesozoic Era was the Cretaceous. What happened at the end?

Late in the Paleozoic, the Pangaea formed. The climate in the center of it was probably:

Earth's earliest atmosphere lacked which gas that is necessary for life?

What has the study of fossils allowed scientists to do?

This forms when livings things die and are buried by sediment.

The study of past life.

The Cenozoic Era is our current era. What period within the era are we in right now?

The word means it no longer exists and will never live again on Earth.

Which best describes the climates of Europe and North America during 1.8 my of the Quaternary P

A carbon film will preserve the delicate parts of:

Oceans began to form and islands began to appear during this time period.

The trilobites lived during only one era. Which one?

95% of life became extinct during this period.

At the end of which period in the Paleozoic era was there a major mass extinction?

During what period did the largest dinosaurs live?

During the Cambrian Explosion, the many new forms of life that evolved:

This is an example of a hard part of an organism that can be fossilized

The time it takes for half of a radioactive atoms in a sample of a radioactive element to decay

Geologists use radioactive dating to:

During the Paleozoic, the first organisms to live partly on land were