Rocks Strata and Earth History

How do sedimentary rocks form on Earth’s surface?

• in vertical stripes

• with no clear pattern

• in horizontal layers

• in a crisscross pattern

What are strata?

• inconsistencies in the fossil record

• rock layers

• well-known and widespread fossils

• units of time

Tags

NGSS.MS-ESS1-4

What is normally found at the lowest stratum?

• all of the fossils

• all of the volcanic ash

• the youngest rock

• the oldest rock

Tags

NGSS.MS-ESS1-4

Stratigraphy is the study of

• evolution.

• human history.

• rock layers.

• Earth’s atmosphere.

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-3

Which of the following is not a unit of geologic time?

• epoch

• millennium

• era

• age

Tags

NGSS.MS-ESS1-4

Which of the following describes the relative age of someone or something?

• Kaitlyn is younger than Dillon

• Dillon is 13 years old

• The trilobite is an index fossil.

• The trilobite appeared 521 million years ago.

True or false: Sometimes older rocks end up on top of younger rocks.

• True

• False

Tags

NGSS.MS-ESS1-4

Using a substance’s rate of decay to determine its age is an example of

• relative dating.

• using index fossils.

• chemical engineering.

• absolute dating.

Tags

NGSS.HS-PS1-8

What happened during the Cambrian explosion?

• Dinosaurs went extinct.

• Many animals first appeared.

• Single-celled life first appeared.

• Humans first appeared.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Which of the following rock layers contains the youngest fossils?

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-4