Earth's Past

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

• Absolute Age

• Relative Age

• Index fossil

• Trace fossil

The principle that a sedimentary rock layer is older than the layers above it and younger than the layers below it if the layers are not disturbed.

• Law of Superposition

• Law of Crosscutting Relationships

• Principle of Lateral Continuity

• Principle of Original Horizontality

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

Which of the following is evidence that supports continental drift?

• the presence of penguins at both the equator and Antarctica
• fossils of the same plant have been found on several continents
• the presence of glacial features in Antarctica
• the presence of volcanic rock in Antarctica

Tags

NGSS.MS-LS4-1

NGSS.MS-ESS2-3

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

Index fossils help determine relative age through correlating rock layers.

• True
• False

Tags

NGSS.MS-ESS1-4