Unit 2: The Changing Earth

Fossils are

• Only dinosaur bones.

• Traces or remains of living things from long ago.

• Anything preserved in amber or tar.

• A special type of sedimentary rock.

Choose the choices that are types of fossils:

• Original remains

• Molds and casts

• Tree rings

• Ice cores

Tags

NGSS.MS-LS4-1

Relative age is

• age of an object in relation to other events or objects

• the exact age of an object

• the age of your relatives

Fossils that were common, in many areas, and only existed in specific time periods that help determine when rock layers formed are called:

• index fossils

• petrified wood

• carbon dating

• absolute age

Tags

NGSS.MS-ESS1-4

Radioactive dating identifies the _ age

Tags

NGSS.HS-PS1-8

The amount of time it takes for half the atoms in a radioactive element to breakdown is called:

• absolute age

• radioactive dating

• half-life

• carbon dating

Tags

NGSS.HS-PS1-8

The theory that Earth is an ever changing place and the same forces of change at work today were at work in the past is called:

• Unpredictability

• Constancy

• Uniformitarianism

• Continental Drift

Which of the following can show how long warm or cold periods lasted?

• Tree rings

• Ice cores

• Index fossils

• Sedimentary rocks

What was the earliest form of life?

• Single-celled organism

• Fern

• Fish

• Frog

Tags

NGSS.MS-LS1-1

Which best describes why no fossils are found in igneous rocks?

• Layering does not occur

• Organisms avoid volcanoes

• Heat involved in igneous rocks destroys an organism before the fossil can form

• Fossils are found in igneous rocks.