Podcast
Questions and Answers
What technology, introduced during World War I, helped reveal the Mid-Ocean Ridge?
What technology, introduced during World War I, helped reveal the Mid-Ocean Ridge?
- Echo-sounding devices (correct)
- Oil drilling platforms
- Submarines
- Satellites
What common misconception did many scientists in the 1800s have about the ocean floor before the discovery of the Mid-Ocean Ridge?
What common misconception did many scientists in the 1800s have about the ocean floor before the discovery of the Mid-Ocean Ridge?
- The ocean floor was flat and featureless. (correct)
- The ocean floor was teeming with marine life.
- The ocean floor was composed entirely of sand.
- The ocean floor was covered in dense vegetation.
What key mysteries of planet Earth did the discovery of the Mid-Ocean Ridge help unlock?
What key mysteries of planet Earth did the discovery of the Mid-Ocean Ridge help unlock?
- Volcanic eruptions and plate tectonics
- Sea floor spreading and polar reversal (correct)
- Climate change and continental drift
- Polar reversal and mountain formation
What was the main component of the ocean floor that scientists understood by the middle of the 20th century?
What was the main component of the ocean floor that scientists understood by the middle of the 20th century?
Which technology used to measure seafloor depths by bouncing sound signals off the ocean floor originated during World War I?
Which technology used to measure seafloor depths by bouncing sound signals off the ocean floor originated during World War I?
What technology was NOT well-suited for exploring the tremendous depths of the oceans in the 1800s?
What technology was NOT well-suited for exploring the tremendous depths of the oceans in the 1800s?
What new technology during World War I helped scientists measure seafloor depths accurately?
What new technology during World War I helped scientists measure seafloor depths accurately?
What is the main reason behind the alternating stripes of rock with different polarities on the ocean floor?
What is the main reason behind the alternating stripes of rock with different polarities on the ocean floor?
Which best describes the process of sea floor spreading?
Which best describes the process of sea floor spreading?
What led scientists to hypothesize a connection between sea floor spreading and polar reversal?
What led scientists to hypothesize a connection between sea floor spreading and polar reversal?
Why did scientists conclude that the Earth's magnetic field must have flip-flopped multiple times?
Why did scientists conclude that the Earth's magnetic field must have flip-flopped multiple times?
What role do magnetic minerals in basalt play in giving the rock its properties?
What role do magnetic minerals in basalt play in giving the rock its properties?
How does the creation of new oceanic crust occur during sea floor spreading?
How does the creation of new oceanic crust occur during sea floor spreading?
What key observation helped scientists understand the connection between mid-ocean ridges and polar reversals?
What key observation helped scientists understand the connection between mid-ocean ridges and polar reversals?
Which phenomenon was not a direct result of sea floor spreading?
Which phenomenon was not a direct result of sea floor spreading?
