Video on magnetic striping

What was the primary purpose of the Magnetic Anomaly Detector (MAD) developed by the US Navy during the Cold War?

• To detect underwater seismic activity.

• To map the ocean floor's topography.

• To locate Soviet submarines.

• To measure ocean currents.

Are you enjoying the video lesson?

• Yes

• No

What unusual geological feature was discovered by the Magnetic Anomaly Detector (MAD) in the oceans?

• Deep-sea trenches.

• Alternating stripes of magnetic rocks.

• Large underwater volcanoes.

• Ancient shipwrecks.

How often do Earth's magnetic poles typically reverse their polarity?

• Every few years.

• Every few decades.

• Approximately every 300,000 years.

• Only once in Earth's history.

What would happen to a compass if Earth's magnetic field suddenly flipped 180 degrees?

• It would stop working.

• It would point towards the East.

• It would point towards the South.

• It would spin uncontrollably.

How do magnetic minerals in molten rock record the Earth's magnetic field direction?

• They crystallize into unique shapes.

• They align with the magnetic field and become locked in position upon cooling.

• They change color based on the field's strength.

• They become non-magnetic.