Ch. 9 Clues to earth's past

The age of an object in relation to the age of other objects.

• Absolute Age

• Relative Age

• Index fossil

• Trace fossil

What is a fossil?

• Foot prints, burrows, or other impressions made by animals that give use clues to how they lived.
• When things die and their remains are buried.
• The preserved remains of an organism.
• The age determined by the things around it.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

What is 'half-life'?

• The age determined by the things around it.
• The age of an igneous rock.
• The age determined by radioactive dating.
• The time it takes for 1/2 of the radioactive atoms to decay in an element.

Tags

NGSS.HS-PS1-8

Geologists use radioactive dating to determine THE ABSOLUTE AGE OF ROCKS.

• True
• False

Tags

NGSS.HS-ESS1-5

 Absolute age is the true age of something compared to something else.

• True
• False

Tags

NGSS.HS-ESS1-5

_______________is the method of determining the absolute ages of rocks.

• radioactive dating
• carbon-14 dating

Tags

NGSS.HS-ESS1-5

The Law of Superposition helps scientists to determine what?

• The absolute age of rock layers
• The age of fossils
• The relative age of rock layers
• the super powers of rocks

Tags

NGSS.MS-ESS1-4

What is the youngest layer in the outcrop?

• A
• B
• C
• D

Tags

NGSS.MS-ESS1-4

Which of the following correctly lists the layers in order from oldest to youngest?

• A, B, C, D, E
• E, B, C, D, A
• E, D, C, B, A
• C, B, A, D, E

Tags

NGSS.MS-ESS1-4

Fossils in which the spaces inside are filled with minerals from ground water 

• carbon film
• relative age
• premineralized remains
• index fossil