Podcast
Questions and Answers
What did the early echo-sounding devices reveal about the ocean floor?
What did the early echo-sounding devices reveal about the ocean floor?
- The ocean floor contained an underwater mountain range, later called the Mid-Ocean Ridge (correct)
- The ocean floor was a relatively flat surface with few distinct features
- The ocean floor was covered in thick layers of sediment
- The ocean floor was a deep, featureless abyss
What clues did the discovery of the Mid-Ocean Ridge provide that would soon unlock two mysteries of planet Earth?
What clues did the discovery of the Mid-Ocean Ridge provide that would soon unlock two mysteries of planet Earth?
- Sea floor spreading and plate tectonics
- Plate tectonics and continental drift
- Sea floor spreading and polar reversal (correct)
- Sea floor spreading and continental drift
What was the primary limitation that scientists in the 1800s faced when trying to explore the ocean floor?
What was the primary limitation that scientists in the 1800s faced when trying to explore the ocean floor?
- Lack of suitable vessels for deep-sea exploration (correct)
- Lack of funding for ocean exploration
- Lack of advanced mapping technology
- Lack of scientific interest in the ocean floor
What was the prevailing scientific opinion about the ocean floor in the 1800s?
What was the prevailing scientific opinion about the ocean floor in the 1800s?
What type of new technology was used in the middle of the 20th century to detect peculiar magnetic readings from the ocean floor?
What type of new technology was used in the middle of the 20th century to detect peculiar magnetic readings from the ocean floor?
What was the significance of the peculiar magnetic readings detected from the ocean floor?
What was the significance of the peculiar magnetic readings detected from the ocean floor?
Which of the following was NOT a key discovery or development that helped scientists understand the ocean floor in the early-to-mid 20th century?
Which of the following was NOT a key discovery or development that helped scientists understand the ocean floor in the early-to-mid 20th century?
What is the main component of the ocean floor that gives it magnetic properties?
What is the main component of the ocean floor that gives it magnetic properties?
What did scientists initially discover about the magnetic properties of the ocean floor?
What did scientists initially discover about the magnetic properties of the ocean floor?
What hypothesis did scientists develop to explain the alternating pattern of magnetic polarity in the ocean floor?
What hypothesis did scientists develop to explain the alternating pattern of magnetic polarity in the ocean floor?
What process leads to the creation of new oceanic crust and the alternating pattern of magnetic polarity?
What process leads to the creation of new oceanic crust and the alternating pattern of magnetic polarity?
How do the magnetic minerals in the solidifying rock record the earth's magnetic orientation at the time?
How do the magnetic minerals in the solidifying rock record the earth's magnetic orientation at the time?
What is the significance of the alternating pattern of magnetic polarity in the ocean floor?
What is the significance of the alternating pattern of magnetic polarity in the ocean floor?
What is the relationship between the age of the ocean floor and its distance from the mid-ocean ridge?
What is the relationship between the age of the ocean floor and its distance from the mid-ocean ridge?
What is the role of magma in the process of seafloor spreading?
What is the role of magma in the process of seafloor spreading?
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