Unit 1: Earth's History Test Review

Front

Based on the Law of Superposition, what can be concluded about fossils?

Back

The oldest fossils are found in the lowest rock layers.

Front

The Law of Superposition states that, in horizontal layers of sedimentary rock, each layer is _______.

Back

Older than the layers above it and younger than the layer below it

Front

Which of the following does the fossil record suggest about life on Earth? That most species have always been here, That mutations are the reasons for evolution, That life came to Earth on an asteroid, That living species have changed over time

Back

That living species have changed over time

Front

Index fossils are fossils of organisms that lived only briefly and are found in many different places. These characteristics of index fossils make them most useful in determining which of the following?

Back

The relative age of rock layers in which they are found

Front

What is the age of intrusion G in relation to the sedimentary rock layers through which it passes?

Back

Intrusion G is younger than the rocks through which it passes.

Front

The lower boundary of layer B represents an unconformity. Which geologic process was responsible for creating the unconformity?

Back

Erosion

Front

The imprint of an animal track in sedimentary rock is an example of a ____.

Back

Trace fossil

Front

Which of the following best describes the geologic time scale? Options: It is a record of the thickness of sedimentary rock, It is a record of the rate of fossil formation, It is a record of the life forms and geologic events in Earth's history, It is a record of the time since the extinction of the dinosaurs

Back

It is a record of the life forms and geologic events in Earth's history

Front

How were the major divisions of the geologic time scales determined?

Back

Evidence of major changes in the life forms on Earth

Front

Which division of the geologic time scale encompasses most of the time Earth has existed?

Back

Precambrian