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Questions and Answers
What is the main focus of the text?
What is the main focus of the text?
- The exploration of the world beneath the ocean waves
- The geological mysteries left behind by the earth's crust
- The discovery of the marianas trench (correct)
- The impact of glaciers on the earth's crust
When was the marianas trench first explored?
When was the marianas trench first explored?
- In the early 1900s
- During the Challenger expedition in 1872 (correct)
- During the 1940s
- In 1951
What technology emerged 75 years after the discovery of the marianas trench?
What technology emerged 75 years after the discovery of the marianas trench?
- Underwater drones
- Submarine detection sonar (correct)
- Satellite imaging
- GPS mapping
How deep is the marianas trench?
How deep is the marianas trench?
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What was used to measure the depth of the ocean floor during the Challenger expedition?
What was used to measure the depth of the ocean floor during the Challenger expedition?
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What did the Challenger expedition mark the birth of?
What did the Challenger expedition mark the birth of?
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Which technology did scientists realize they could use to build a remarkably accurate picture of the world beneath the waves?
Which technology did scientists realize they could use to build a remarkably accurate picture of the world beneath the waves?
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What did sonar technology originally aim to detect?
What did sonar technology originally aim to detect?
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How did scientists use sonar to chart the bottom of the sea?
How did scientists use sonar to chart the bottom of the sea?
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What was discovered at a depth of 4475 fathoms?
What was discovered at a depth of 4475 fathoms?
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What was used during early 1900s to detect submarines lurking in deep?
What was used during early 1900s to detect submarines lurking in deep?
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What was used to measure ocean floor depths in early days?
What was used to measure ocean floor depths in early days?
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