Earth History Test Review

Absolute Dating

• Method of measuring the age of an event or object using radioactive elements. Gives an exact date.

• Method to determine if an event or object is older or younger by comparing the rock layers.

• Principle that States that are above the rocks if the younger layers of oldest rocks have not been disturbed

Tags

NGSS.MS-ESS1-4

Relative Dating

• Method to determine if an event or object is older or younger by comparing the rock layers.

• Method of measuring the age of an event or object using radioactive elements. Gives an exact date.

• Principle that States that are above the rocks if the younger layers of oldest rocks have not been disturbed

Tags

NGSS.MS-ESS1-4

Law of Superposition

• Principle that States that are above the rocks if the younger layers of oldest rocks have not been disturbed

• Method to determine if an event or object is older or younger by comparing the rock layers.

• Method of measuring the age of an event or object using radioactive elements. Gives an exact date.

Tags

NGSS.MS-ESS1-4

Half Life

• The time required for half of a sample of a radioactive substance to undergo radioactive decay

• Principle that States that are above the rocks if the younger layers of oldest rocks have not been disturbed

• Method to determine if an event or object is older or younger by comparing the rock layers.

Tags

NGSS.HS-PS1-8

Fossil

• The remains or evidence of a physical body preserved by geological processes.

• A fossil who only lived short time but was widely distributed. Ex. Trilobites

• The time required for half of a sample of a radioactive substance to undergo radioactive decay

• Method to determine if an event or object is older or younger by comparing the rock layers.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Index Fossil

• A fossil who only lived short time but was widely distributed. Ex. Trilobites

• The remains or evidence of a physical body preserved by geological processes.

• middle life (245-144 million years ago); rise of mammals and dinosaurs; the rise of birds; extinction of dinosaurs, rise of flowering plants

Tags

NGSS.MS-LS4-1

In what type of rock would a geologist MOST likely find evidence of ancient life?

• sedimentary

• igneous

• metamorphic

Tags

NGSS.MS-LS4-1

Which method would be BEST for scientists to use to determine the absolute age of a Precambrian igneous rock?

• index fossils

• law of superposition

• radiometric dating

• relative dating

Which method can BEST be used by the students to determine the relative age of rock layers?

• radiometric dating

• rock type evaluation

• the law of superposition

• principle of uniformitarianism

Why do scientists use relative dating although it doesn't give you an exact age?

• radiometric and absolute dating only work on organic (things that have lived)

• law of superposition does give you an exact number

• radiometric dating is only done on intrusions (magma) because magma is very radioactive (dangerous)