Vocabulary Geological History of Earth

A type of fossil formed when a shell or other hard part of an organism dissolve, leaving an empty space in the shape of the part

• Mold

• Cast

• Fossil

• Trace Fossil

A type of fossil that forms when a mold becomes filled in with minerals that then hardens

• mold

• cast

• trace fossil

• intrusion

A type of fossil that provides evidence of the activities of ancient organisms

• mold

• cast

• trace fossil

• intrusion

A scientist who studies fossils to learn about organisms that lived long ago

• archeologist

• paleontologist

• geologist

• biologist

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

The age of a rock compared to the ages of other rock layers

• radioactive dating

• absolute age

• relative age

• index fossil

Tags

NGSS.MS-ESS1-4

The principle that states that is a rock layer is undisturbed, the oldest rock layer is always at the bottom

• Law of Superposition

• Law of Cross-Cutting Relationship

• Law of Horizontality

• Law of Unconformity

Tags

NGSS.MS-ESS1-4

The preserved remains or evidence of an organism that lived in the past

• fossil

• paleontoligist

• rock strata

• intrusion

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

The geological processes that occur today are similar to those that have occurred in the past

• Law of Uniformitariansim

• Law of Superposition

• Law of Cross Cutting Relationship

• Law of Intrusion

Tags

NGSS.MS-ESS2-2

The principle that states a piece of an older rock that becomes a part of a new rock, it is always younger than the rock layer it cuts through

• Intrusion

• Inclusion

• unconformity

• relative age

Tags

NGSS.MS-ESS1-4

The principle that states that a place where an old, eroded rock surface is in contact with a newer rock layer---leaving a gap in the history of the earth

• The principle of unconformity

• The principle of intrusion

• The principle of inclusion

• The principle of cross cutting relationship