Geologic Timeline Esrt

Index fossils are useful to geologists if the fossils ____.

• have lived over a short period of time

• are not easily recognized

• are not widely distributed geographically

• are scarce

The division of Earth’s history into smaller units makes up the _____.

• eras

• geologic time scale

• periods

• sequence of events

Tags

NGSS.MS-ESS1-4

Geologic time is divided into units based upon evidence from _____.

• sedimentary rocks

• climatic changes

• fossils

• igneous rocks

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Scientists know that a meteorite impact caused dinosaurs to become extinct. _______________

• true

• false

Tags

NGSS.MS-LS4-1

The principle of uniformitarianism states that sedimentary rocks are deposited in horizontal layers.

• True

• False

The principle of __ states that, in an undisturbed sequence, the oldest rocks are at the bottom of the sequence and successive layers are younger than those below them.

• lateral continuity

• original horizontality

• superposition

• inclusions

The remains of living plants or animals are called fossils.

• true

• false

Tags

NGSS.MS-LS4-1

Determining the order of events and the relative age of rocks by examining the position of rocks in a sequence is called ____.

• absolute dating

• radiometric dating

• relative dating

• radiocarbon dating

Tags

NGSS.MS-ESS1-4

What classification of unconformity occurs when sedimentary rock overlies igneous rock?

• disconformity

• nonconformity

• angular unconformity

• angular unconformity

When part of the rock record is destroyed, the erosional gap that forms is a(n) ____.

• inclusion

• key bed

• unconformity

• superposition