8th Grade Chapter 8 (Geologic Time)

Weathering breaks rocks into smaller pieces called _____.

• particles

• sediments

• pebbles

• all the above

_____ might be the remains of organisms that no longer live on Earth.

• fossils

• dinosaurs

• echinoderms

• marsupials

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

An element is a substance that contains only one type of _____.

• particle

• atom

• molecule

• compound

What is half-life?

• taking an atom and splitting it in half

• time required for half of the radioactive element to decay

• process in which one element naturally changes into another

• none of the above

Tags

NGSS.HS-PS1-8

In which time period are we currently living?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Tags

NGSS.MS-ESS1-4

Which time period is the longest?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Tags

NGSS.MS-ESS1-4

Use the diagram to answer. Which rock layer is the newest?

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-4

Use the diagram to answer. Which rock layer has a fossil that is older than the fish fossil?

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-4

Approximately how old is Earth?

• 1 million years

• 4.6 billion years

• 4.6 million years

• 4 thousand years

Tags

NGSS.MS-ESS1-4

The end of life for a group of organisms, usually a species, is called a ___________.

• wipeout

• mass extinction

• meteorite

• dying off

Tags

NGSS.MS-LS4-1