Fossils, Relative Dating, Absolute Dating

Used to determine whether an object is older or younger than other objects

• Unconformity

• Relative Dating

• Fossil

Which law states that younger rocks lie above older rocks if the layers have not been disturbed

• Unconformity

• Law of superposition

• Relative Dating

Relative dating of rock layers tells us that the deeper we dig, _______.

• the younger the rocks get

• the smellier the rocks get

• the older the rocks get

_{Which rock layer in the diagram seems to be the oldest?}

• F
• E
• B
• A

Tags

NGSS.MS-ESS1-4

According to the law of superposition, which layer is the youngest?

• A
• B
• C

Tags

NGSS.MS-ESS1-4

The length of time required for half of the radioactive atoms in a sample to decay is its...

• era

• age

• half-life

How does absolute age differ from relative age?

• only absolute dating indicates which rock is older than another
• only absolute dating finds the age in years
• only relative dating finds the age in years

According to the law of superposition, the oldest fossils are found 

• At the top of the rock layers
• Near the bottom of the rock layers
• In the middle of the rock layers
• Somewhat near the surface

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

states that the geologic feature which cuts another is the younger of the two features

• law of horizontality

• cross cutting relationships

• uniformitarianism

What element is usually used to date fossils?

• uranium-235

• carbon-14

• thorium-234