Earth's History

What is a principal that states that geologic processes that occurred in the past can be explained by current geologic processes.

• Catastrophism

• Unconformity

• Uniformitarianism

• Angular Unconformity

Tags

NGSS.MS-ESS3-1

A fossilized mark that is formed in soft sediment by the movement of an animal.

• Mold

• Cast

• Index Fossil

• Trace Fossil

A fossil that is found in the rock layers of only one geologic age and that is used to establish the age of the rock layers.

• Trace Fossil

• Index Fossil

• Mold

• Cast

Tags

NGSS.MS-ESS1-4

Any method of determining whether an event or object is older or younger than other events or objects.

• Relative Dating

• Absolute Dating

• Isotope

• Speed Dating

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS1-6

A break in the geologic record created when rock layers are eroded or when sediment is not deposited for a long period of time.

• Disconformity

• Monoconformity

• Unconformity

• Angular Unconformity

Tags

NGSS.MS-ESS1-4

Any method of measuring the age of an event or object in years.

• Absolute Dating

• Relative Dating

• Speed Dating

• Isotope

Tags

NGSS.HS-ESS1-6

An atom that has the same number of protons as the other atoms of the same element but has a different number or neutrons.

• Radio Active Decay

• Isotope

• Half-life

• Full-life

The process in which a radioactive isotope tends to break down into a stable isotope of the same element or another element.

• Radioactive Decay

• Isotope

• Half-life

• Full-life

Tags

NGSS.HS-PS1-8

The scientific study of fossils.

• Geology

• Paleontology

• Biology

• Anthropology

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

A method of determining the age of an object by estimating the relative percentages of a radioactive isotope and a stable isotope.

• Half-life

• Radiometric dating

• Isotope

• Periodic Table of the Elements