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Plate Tectonics: Theory and Movement

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Questions and Answers

What is plate tectonics?

The theory that the earth's crust is made of chocolate

The theory that the earth's crust is one solid piece

The theory that the earth's crust is composed of only one type of rock

The theory that the earth's crust is broken up into plates (correct)

What was the Deep Sea Drilling Project (DSDP) designed to do?

Create new oceanic crust

Build underwater structures on the ocean floor

Study the behavior of sea creatures at great depths

Analyze the ocean floor by drilling down and extracting samples (correct)

What did the Glomar Challenger ship do?

Explored outer space

Traveled across the Atlantic Ocean drilling core samples into the sea floor (correct)

Sailed around the world for leisure

Transported goods between continents

How do tectonic plates move?

Push together, pull apart, or slide past each other Signup and view all the answers

What was the main task of the Deep Sea Drilling Project (DSDP)?

To drill down into the ocean floor and extract samples of the ocean sediments and underlying oceanic crust Signup and view all the answers

What is the Mid-Atlantic Ridge?

An underwater mountain range in the Atlantic Ocean Signup and view all the answers

What is the main cause of the creation of the oceanic ridge system?

Seafloor spreading due to upwelling of magma through diverging tectonic plates Signup and view all the answers

Why were some scientists perplexed about the idea of the Mid-Atlantic Ridge being a tectonic plate boundary?

They found it hard to believe that magma could ooze up through a crack in the earth's crust Signup and view all the answers

What did the samples taken from the ridge system show about the rocks and sediment near the ridge crest?

Rocks near the crest were very young and sediment thickness increased farther away from the crest Signup and view all the answers

What did the samples taken from the ridge system provide strong evidence for?

The earth's crust being made up of moving tectonic plates Signup and view all the answers