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Questions and Answers
What is the main focus of the text?
What is the main focus of the text?
When was the marianas trench first explored?
When was the marianas trench first explored?
What technology emerged 75 years after the discovery of the marianas trench?
What technology emerged 75 years after the discovery of the marianas trench?
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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