Geological Time

In which time period are we currently living?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

In what time period did Pangaea, the super continent, appear?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

Dinosaurs, small mammals, and birds are found in this time period.

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

Dinosaurs, small mammals, and birds are found in this time period.

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

Which fossil is the youngest?

• fossil A

• fossil B

• fossil C

• fossils A and B are the same age

Geologists assume the newest rock layers are on top of the older ones, unless some type of disturbance occurs, in known as …

• Law of Inclusions

• Law of Crosscutting

• Law of Conservation

• Law of Superposition

Uses the decay of radioactive elements to find the ___________________________ of a rock or fossil.

• Relative age

• Absolute age

• New age

• Real Age

These specialized fossils indicate to geologists the boundaries in geological time and determine the age of rocks.

• Index fossils

• Limestone fossils

• Amber fossils

• Cast fossils

Approximately how old is the Earth?

• 4.6 billion years old

• 4.6 million years old

• 5 billion years old

• 5 million years old

The second broadest category of geologic time is______________?. The Cenozoic is one of them.

• era

• eon

• epoch

• period