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Questions and Answers
What technique was used during the HMS Challenger Expedition to map the ocean floor?
What technique was used during the HMS Challenger Expedition to map the ocean floor?
- Magnetic field analysis
- Sounding (correct)
- Seismology
- Nuclear decay
Who discovered the concept of a half-life in nuclear decay?
Who discovered the concept of a half-life in nuclear decay?
- HMS Challenger Expedition team
- Jean Bruhnes
- Rutherford (correct)
- Lord Kelvin
What is the main way of determining the age of rocks using half-life?
What is the main way of determining the age of rocks using half-life?
- Carbon-14 to Nitrogen-14 decay
- Uranium-238 to Lead-206 decay (correct)
- Potassium-40 to Argon-40 decay
- Uranium-235 to Lead-207 decay
Which scientist discovered small grains of mineral magnetite in volcanic rocks?
Which scientist discovered small grains of mineral magnetite in volcanic rocks?
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What is one of the ways mentioned in the text that helped understand the interior structure of the Earth?
What is one of the ways mentioned in the text that helped understand the interior structure of the Earth?
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Which scientist discovered that the Earth's magnetic field sometimes changes orientation over time?
Which scientist discovered that the Earth's magnetic field sometimes changes orientation over time?
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What did the HMS Challenger Expedition discover that changed the idea of a featureless ocean floor?
What did the HMS Challenger Expedition discover that changed the idea of a featureless ocean floor?
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