A Trip Through Geologic Time

Front

What are index fossils?

Back

Fossils used to determine the relative ages of rock layers.

Front

Why are index fossils useful?

Back

They help in identifying the relative ages of rock layers.

Front

From which group did reptiles evolve?

Back

Reptiles evolved from amphibians.

Front

What is the Mesozoic Era often referred to as?

Back

The Age of Reptiles.

Front

What are eras divided into on the geologic time scale?

Back

Eras are divided into periods.

Front

What is radioactive dating used for?

Back

To determine the absolute ages of rocks.

Front

What is the difference between absolute age and relative age?

Back

Absolute age is the exact age of a rock, while relative age is its age compared to other rocks.

Front

What is the significance of the geologic time scale?

Back

It organizes Earth's history into manageable segments based on significant events.

Front

What major event marks the end of the Mesozoic Era?

Back

The mass extinction event that wiped out the dinosaurs.

Front

What are the three main eras of the geologic time scale?

Back

Paleozoic, Mesozoic, and Cenozoic.