Earth's Past

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.

Tags

NGSS.MS-LS4-1

Choose the choices that are types of fossils:

• Original remains

• Molds and casts

• Tree rings

• Ice cores

Tags

NGSS.MS-LS4-1

What can you find original remains fossils in?

• Rock

• Ice

• Amber

• Tar

Original remains are

• a tubular sample that shows layers of ice and snow.

• minerals that have replaced the organisms cells.

• a visible shape left left after an organism was buried in sediment.

• actual bodies or body parts of organisms.

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

Absolute age

• the youngest age something can be

• the oldest age something can be

• the age of an object relative to other objects or events

• the exact age of an object

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

Tags

NGSS.MS-LS4-1