Rocks become magnetic when(1 point)

Question

Responses

continents move.
continents move.

rocks are heated to extreme temperatures.
rocks are heated to extreme temperatures.

iron particles within the rock align with Earth's magnetic field.
iron particles within the rock align with Earth's magnetic field.

Earth's magnetic field reverses direction.
Earth's magnetic field reverses direction.
Question 2
What can scientists learn from magnetic striping patterns? Select the three correct answers.(1 point)
Responses

the exact location of the next earthquake along the California coast
the exact location of the next earthquake along the California coast

the speed of one plate as it subducts below another plate
the speed of one plate as it subducts below another plate

the year the next magnetic reversal will take place
the year the next magnetic reversal will take place

the location of ancient faults caused by seismic activity.
the location of ancient faults caused by seismic activity.

the cause of magnetic pole reversals
the cause of magnetic pole reversals

the direction plates are moving relative to each other
the direction plates are moving relative to each other
Question 3
Identify the factors that cause magnetic stripes to form along the ocean floor. Select the two correct answers.(1 point)
Responses

Magnetic direction of rock changes as Earth’s magnetic poles drift.
Magnetic direction of rock changes as Earth’s magnetic poles drift.

Plates move as new rock forms, which causes magnetic direction to skew away from normal.
Plates move as new rock forms, which causes magnetic direction to skew away from normal.

Magma acquires the magnetic direction present on Earth when it hardens into rock.
Magma acquires the magnetic direction present on Earth when it hardens into rock.

Rock forming at the oceanic ridge pushes older rock outward in both directions.

Answer 1

Question 1: Rocks become magnetic when:

• iron particles within the rock align with Earth's magnetic field.

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Question 2: What can scientists learn from magnetic striping patterns? Select the three correct answers:

• the speed of one plate as it subducts below another plate
• the location of ancient faults caused by seismic activity.
• the direction plates are moving relative to each other

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Question 3: Identify the factors that cause magnetic stripes to form along the ocean floor. Select the two correct answers:

• Magnetic direction of rock changes as Earth’s magnetic poles drift.
• Magma acquires the magnetic direction present on Earth when it hardens into rock.