End of Q1 Gr 8 Test Part A

In 1 or 2 sentences, explain what uniformitarianism states

The scientific study of fossils is called

• geology

• astronomy

• archeology

• paleontology

Based on your knowledge of relative dating, order the layers/events (by letter) from oldest to youngest

B is the second youngest event in this diagram. Which two principles of geology help us make that conclusion

• Law of Inclusions only

• Law of Superposition and Law of Inclusions

• Law of Superposition and Law of Cross-Cutting Relationships

• Law of Faunal Succession and Law of Superposition

The method of establishing the exact age of an event, in years, using chemical properties of the rock/fossil is

• relative dating

• absolute dating

• superposition

• none of the above

Which of the following is the largest division of geologic time?

• era

• epoch

• period

• eon

What happened in the Hadean eon?

• dinosaurs flourished

• the earth was formed

• mammals flourished

• mass extinction

What happened during the Proterozoic eon?

• Primitive life forms like cyanobacteria appeared.

• the continents formed

• the earth was formed

• none of the above

In 2 or 3 sentences, describe what an index fossil is and why we use them for relative dating.

Earth's oceans cover

• 71%

• 25%

• 50%

• 90%