Earth's History of Change Notes Review

What geologic principles (or laws) are best displayed here?

• Superposition

• Original horizontality

• Cross-cutting relationships

• Unconformities

Which layer is OLDER? Layer M or Intrusion P?

• Layer M

• Intrusion P

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS1-6

States that younger rocks lie above older rocks if the layers have not been disturbed

• Law of crosscutting
• Law of superposition
• Relative Dating
• Unconformity

Tags

NGSS.MS-ESS1-4

A break in the geologic record that is made when rock layers are eroded over a long period of time

• Law of Superposition
• Law of Crosscutting
• Relative Dating
• Unconformity

How does the law of crosscutting explain the age of a fault?

• The fault is younger than the rocks above it.
• The fault is younger than the rocks it cuts through.
• The fault is older than the rocks above it.
• The fault is older than the rocks it cuts through.

Tags

NGSS.4-ESS1-1

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

Scientists use radioactive decay to measure...

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

Tags

NGSS.HS-PS1-8

If the half-life of a radioactive group of atoms is 100 years, then how old is the rock if there have been two half-lives?

• 25 years

• 200 years

• 400 years

• 800 years

This process, which forms planets, occurs when gravity makes planetesimals collide. This creates great heat which melts and fuses the materials together.

• Differentiation

• Secretion

• Accretion

• Planetary formation

Tags

NGSS.HS-ESS1-6

Cyanobacteria photosynthesize and created waste gases which led to what???

• The great nitration event

• The great oxygenation event

• The great carbon dioxide event

• The great ozonification bifurcation event