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Geology Continental Drift and Seafloor Spreading

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Geology Continental Drift and Seafloor Spreading

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Questions and Answers

What does the Continental Drift Theory propose about the arrangement of continents?

All continents were once joined as a single landmass. (correct)

Continents formed from volcanic activity.

Continents have always been in their current positions.

Continents are fixed and do not move.

Which of the following provides evidence for Continental Drift through fossil findings?

Rock formations matching between continents.

Presence of coal deposits in Africa.

Fossils of Glossopteris found on multiple continents. (correct)

The jigsaw puzzle-like edges of continents.

What evidence is used to support the Continental Drift Theory that involves geological formations?

Fossil distribution in similar climate zones.

The presence of similar minerals on different continents.

Coal deposits formed from tropical forests.

Matching rock formations across continents. (correct)

Who were the scientists that proposed the Seafloor Spreading theory?

<p>Harry Hess and Robert Dietz.</p> Signup and view all the answers

What role do coal deposits play in understanding the Earth's historical environment?

<p>They suggest the presence of ancient swamp plants.</p> Signup and view all the answers

Study Notes

The Earth's Mechanism

Continental Drift Theory: States that continents were once a single landmass (PANGEA) that broke apart and slowly moved to their current positions.
Proposed by: Alfred Wegener
Evidence:
- Continental Jigsaw Puzzle: The edges of continents fit together like a puzzle.
- Fossil Evidence: Fossils of plants and animals found on different continents suggest they were once connected. Examples include Glossopteris and Mesosaurus.
- Rock Evidence: Rock formations on different continents are similar and match up as if they were once connected.
- Coal Deposits: Coal deposits formed from swamp plants found in similar regions across continents.

Seafloor Spreading

Proposed by: Harry Hess and Robert Dietz
Process: New ocean floor is formed near mid-ocean ridges and moves outward.
Results: Creation of new bodies of water.

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Description

This quiz explores the fundamental concepts of continental drift and seafloor spreading. Discover the theories proposed by Alfred Wegener, Harry Hess, and Robert Dietz, along with evidence supporting these geological processes. Test your understanding of the formation of our planet's continents and ocean floors.