Week 20 Geologic Time

Scientists use radioactive decay to measure...

• relative time
• absolute time
• half-lives
• time of day

Tags

NGSS.HS-PS1-8

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

• era
• age
• half-life
• eon

Tags

NGSS.HS-PS1-8

The original element that undergoes radioactive decay is known as the...

• daughter element
• half-life
• parent element
• carbon-14

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

• Superposition
• Relative Dating
• Fossil
• Unconformity

Analyze the seashell found in the white layer.  Which statement is true of the rock layer that contains this fossil?

• It could also contain a fossil from the bottom layer.
• It is older than the layers below it.
• It is younger than the layers above it.
• It is older than the layers above it.

Tags

NGSS.MS-ESS1-4

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

• the younger the rocks get
• the smellier the rocks get
• the harder the rocks get
• the older the rocks get

Tags

NGSS.MS-ESS1-4

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

• A
• B
• C

Tags

NGSS.MS-ESS1-4

Which layer is OLDER? Layer E or Intrusion A?

• Layer E

• Intrusion A

Tags

NGSS.MS-ESS1-4

What is known as the age of a rock or fossil described in comparison to that of another rock or fossil.

• Relative Age

• Absolute Age

• Parent Isotope

• Half-LIfe

Which of the following is a radioactive isotope of the element Carbon that is used in radiometric dating?

• Parent Isoptope

• Uniformatarianism

• Carbon-14

• Half-Life

Tags

NGSS.HS-PS1-8