Earth's History Quiz #2 Review

What is an index fossil?

• A fossil that helps scientists date unknown fossils.

• A fossil that helps scientists locate other fossils.

• A fossil with an unknown time of origin.

• A fossil of the first organism on earth.

What kind of information can scientists learn from an ice core?

• Relative temperature

• Precipitation levels

• Both a and b

• Neither a or b

What does a tree ring represent?

• The type of tree it is.

• The growth of a tree during it's first year of life.

• The height of the tree.

• The growth of a tree during a growing season.

What is a half life?

• Half the age of a radioactive sample.

• The time it takes for half of a rock layer to erode.

• The time it takes for half of a radioactive sample to decay to a stable form.

• The time it takes for a radioactive sample to be half as dangerous.

Tags

NGSS.HS-PS1-8

An index fossil is:

• Widely distributed

• Found only during a limited time frame

• Both a and b

• Neither a or b

Tags

NGSS.MS-LS4-1

An unknown fossil is found in the same rock layer as two index fossils. One fossil existed 225 to 100 mya. The other index fossil existed 125 to 75 mya. The unknown fossil must have existed:

• 225 to 75 mya.

• 225 to 125 mya.

• 100 to 75 mya.

• 125 to 100 mya.

Tags

NGSS.MS-ESS1-4

What is relative dating?

• A method of extracting fossils from rock.

• A method of determining the relative age of a layer of rock.

• A method of determining the actual age of fossils in a rock layer.

• A method of determining the precise age of a rock layer.

An igneous intrusion is:

• The same age as the rock it cuts through.

• Younger than the rock it cuts through.

• Older than the rock it cuts through.

• Not able to cut through a rock layer.

Tags

NGSS.MS-ESS1-4

What is the Law of Superposition?

• Rock layers are formed vertically on top of each other.

• The oldest layers of rock are found closest to the surfsce.

• The youngest layers of rock are found closest to the surface.

• Magma seeps up through the surface covering other layers.

Tags

NGSS.MS-ESS1-4

What is radioactive or radiometric dating?

• A method to determine the actual age of a rock or fossil.

• A method to determine the relative age of a rock or fossil.

• The process of breaking down a radioactive substance.

• Determining the radioactivity of a rock.

Tags

NGSS.HS-PS1-8