Unit 6 Practice Test(7th Grade)

What is the Law of Superposition?

• The principle that states that younger layers of rock are deposited on top of older layers.

• The principle that states that all rock layers are horizontal.

• The principle that states that rock layers are continuous.

• The principle that states that rock layers are cut by faults.

Tags

NGSS.MS-ESS1-4

Explain how the Law of Cross Cutting can be used to determine the relative age of rock layers.

• By identifying the oldest rock layer based on its position.

• By observing that a fault or intrusion is younger than the rock layers it cuts through.

• By measuring the thickness of each rock layer.

• By comparing the color of different rock layers.

Tags

NGSS.MS-ESS1-4

Describe a scenario where the Law of Original Horizontality might not apply.

• When rock layers are deposited in a riverbed.

• When rock layers are tilted by tectonic forces.

• When rock layers are formed by volcanic activity.

• When rock layers are eroded by wind.

Tags

NGSS.MS-ESS2-2

What is an index fossil?

• A fossil that is found in only one location.

• A fossil that is used to determine the absolute age of rock layers.

• A fossil that is used to identify and date the rock layers in which it is found.

• A fossil that is found in the deepest rock layers.

How can unconformities indicate a gap in the geological record?

• By showing a continuous sequence of rock layers.

• By indicating that rock layers have been eroded or not deposited for a period of time.

• By displaying a change in the color of rock layers.

• By showing a sudden increase in fossil content.

Tags

NGSS.MS-ESS1-4

Compare and contrast relative age and absolute age in geology.

• Relative age determines the exact age of a rock, while absolute age compares rock layers.

• Relative age is based on the order of rock layers, while absolute age provides a numerical age.

• Relative age uses radiometric dating, while absolute age uses fossils.

• Relative age is more accurate than absolute age.

What does the Law of Lateral Continuity state?

• Rock layers extend horizontally and can be matched across gaps.

• Rock layers are always deposited in a vertical position.

• Rock layers are cut by faults and intrusions.

• Rock layers are always the same thickness.

Tags

NGSS.MS-ESS1-4

Why are index fossils useful for dating rock layers?

• They are found in all rock layers.

• They are unique to specific time periods and widely distributed.

• They are the oldest fossils found in rock layers.

• They are the largest fossils found in rock layers.

How might the Law of Superposition be used to determine the sequence of events in a geological history?

• By identifying the oldest rock layer based on its color.

• By determining that the lowest rock layer is the oldest and the topmost is the youngest.

• By measuring the thickness of each rock layer.

• By comparing the mineral content of different rock layers.

Tags

NGSS.MS-ESS1-4

What is the significance of unconformities in the geological record?

• They indicate a continuous deposition of rock layers.

• They represent a period of erosion or non-deposition.

• They show a sudden increase in fossil content.

• They indicate a change in rock color.

Tags

NGSS.MS-ESS1-4