Exploring Earth's Geological Mysteries

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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?

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?

Underwater drones

Submarine detection sonar (correct)

Satellite imaging

GPS mapping

How deep is the marianas trench?

7 miles Signup and view all the answers

What was used to measure the depth of the ocean floor during the Challenger expedition?

Lead weight and rope Signup and view all the answers

What did the Challenger expedition mark the birth of?

Modern oceanography Signup and view all the answers

Which technology did scientists realize they could use to build a remarkably accurate picture of the world beneath the waves?

Sonar technology Signup and view all the answers

What did sonar technology originally aim to detect?

Submarines lurking in the deep Signup and view all the answers

How did scientists use sonar to chart the bottom of the sea?

'Ping' sounds bouncing off solid objects Signup and view all the answers

What was discovered at a depth of 4475 fathoms?

A five-mile deep hole Signup and view all the answers

What was used during early 1900s to detect submarines lurking in deep?

Sonar technology Signup and view all the answers

What was used to measure ocean floor depths in early days?

Ropes and lead weights Signup and view all the answers

Exploring Earth's Geological Mysteries

Podcast Beta

Questions and Answers

What is the main focus of the text?

When was the marianas trench first explored?

What technology emerged 75 years after the discovery of the marianas trench?

How deep is the marianas trench?

What was used to measure the depth of the ocean floor during the Challenger expedition?

What did the Challenger expedition mark the birth of?

Which technology did scientists realize they could use to build a remarkably accurate picture of the world beneath the waves?

What did sonar technology originally aim to detect?

How did scientists use sonar to chart the bottom of the sea?

What was discovered at a depth of 4475 fathoms?

What was used during early 1900s to detect submarines lurking in deep?

What was used to measure ocean floor depths in early days?

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