Earth's materials

Early Earth was intensely hot because of

• short-lived radioactive decay.

• intense bombardment from asteroid impacts.

• contraction of materials due to gravity.

• all of these.

Tags

NGSS.HS-ESS1-6

The densest part of planet Earth is the

• core.

• mantle.

• continental crust.

• oceanic crust.

How do sedimentary rocks form on Earth’s surface?

• in vertical stripes

• with no clear pattern

• in horizontal layers

• in a crisscross pattern

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

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

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

• epoch

• millenium

• era

• Period

Tags

NGSS.MS-ESS1-4

What happened during the Cambrian explosion?

• Dinosaurs went extinct.

• Many animals first appeared.

• Single-celled life first appeared.

• Humans first appeared.

Which of the following rock layers contains the youngest fossils?

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Paleontologists are scientists who study evidence of past life on Earth. Which method do paleontologists MOST likely use to determine the forms of life that existed millions of years ago?

• research past species in the library

• examine current species of plants and animals

• interview older scientists

• examine fossil records

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

The diagram shows fossils and rock features. How does intrusion X compare to the ages of the other rock layers and fossils in this geologic column?

• Intrusion X is younger than all the layers.

• Intrusion X is younger than the broadleaf and fern fossils.

• Intrusion X is older than the clam and broadleaf fossils.

• Intrusion X is older than layers Y and Z.

Tags

NGSS.MS-ESS1-4