Geologic Time Scale and Fossils Quiz

What does the geologic time scale represent?

• The history of human civilization

• Earth’s 4.6 billion year history

• The history of the solar system

• The lifespan of rocks

Rock layers (strata) are most useful for:

(a)  

• Determining Earth’s exact age

• Studying fossils and past events
• Measuring earthquakes

• Predicting weather

According to the law of superposition, the

(a)   is the oldest layer in an undisturbed rock strata.

• The top layer

• The middle layer

• The bottom layer
• All are the same age

A fossil is

(a)  

• A type of mineral

• Evidence of past life preserved in rock
• A crystal formation

• An igneous intrusion

Which type of rock is most likely to contain fossils?

• Igneous

• Metamorphic

• Sedimentary

• All of the above

What is the main purpose of the geologic time scale?

• To predict natural disasters

• To organize Earth’s history into manageable units

• To measure earthquakes

• To create maps of rock layers

Why do scientists divide Earth’s history into eras, periods, and epochs instead of one long timeline?

• To make it easier to study and show major changes

• To show Earth’s exact age

• To measure earthquake strength

• To predict future events

If a fossilized plant is found in a rock layer beneath dinosaur fossils, what does this mean?

• The plant lived after the dinosaurs

• The plant lived before the dinosaurs

• The plant and dinosaurs lived at the same time

• The plant is younger than the dinosaurs

Which statement best explains how fossils show that life on Earth has changed over time?

• Fossils are randomly distributed in rocks

• Fossils show simple organisms only

• Fossils appear in an order showing organisms becoming more complex

• Fossils are only found in modern rock layers

Why are rock strata important for understanding Earth’s 4.6 billion year history?

• They allow scientists to measure Earth’s temperature

• They record evidence of past environments and life forms

• They show when volcanoes will erupt

• They help predict earthquakes