ES. 9 Absolute and Relative Age

Why is it unusual that a jellyfish has become fossilized?

• Jellyfish are commonly found in fossil records
• Jellyfish are known for their ability to fossilize easily
• Jellyfish have hard exoskeletons that resist fossilization
• Jellyfish are soft-bodied and made mostly of water, which makes fossilization rare.

What is the difference between relative age and absolute age?

• Relative age is the age of one object compared to another, while absolute age is the age of an object compared to itself.
• Relative age is the actual age of an object in years, while absolute age is the age of one object compared to another.
• Relative age is the age of an object compared to itself, while absolute age is the age of one object compared to another.
• Relative age is the age of one object compared to another, while absolute age is the actual age of an object in years.

What is the law of superposition?

• Oldest rocks are at the bottom and youngest rocks are at the top.
• Youngest rocks are at the bottom and oldest rocks are at the top.
• Rocks are arranged based on their color from top to bottom.
• The law of superposition only applies to sedimentary rocks.

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NGSS.MS-ESS1-4

How are all sedimentary rocks deposited?

• Through volcanic activity
• By evaporation of seawater
• Through metamorphic processes
• Through the process of weathering, erosion, deposition, compaction, and cementation that causes stratification or layers or horizontality.

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NGSS.MS-ESS2-1

What is the law of inclusions?

• Fragments included in a host rock are older than the host rock itself.
• Inclusions are always formed after the host rock.
• Fragments included in a host rock are younger than the host rock itself.
• The law of inclusions states that inclusions are the same age as the host rock.

Which of the following is not one of the 3 circumstances when we would use the law of crosscutting relationships?

• a fault caused by earthquakes

• an igneous intrusion of underground magma

• sedimentary layers being laid down

• an unconformity caused by erosion

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NGSS.MS-ESS1-4

What is an unconformity?

• layers of rock that are bent and tilted

• layers of rock eroded away and then covered with other layers

• layers of rock containing fossils

• horizontal layers of rock with a magma intrusion

What are index fossils?

• Fossils of organisms that are still alive today
• Fossils of organisms that existed for millions of years
• Fossils of organisms that are only found in one specific location
• Fossils of organisms that were widespread but existed for only a short period of time.

What are three different types of intrusions?

• faults, fossils, unconformities

• faults, fossils, sedimentary rocks

• faults, igneous intrusions, unconformities

• faults, igneous rock, sedimentary rock

What are index fossils?

• Index fossils are fossils of organisms that are not useful for dating rock layers.
• Index fossils are fossils of organisms that are found in only one location.
• Index fossils are fossils of organisms that existed for a long period of time.
• Index fossils are fossils of organisms that were widespread but existed for only a short period of time.