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Questions and Answers
What does the Continental Drift Theory propose about the arrangement of continents?
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?
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?
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?
Who were the scientists that proposed the Seafloor Spreading theory?
What role do coal deposits play in understanding the Earth's historical environment?
What role do coal deposits play in understanding the Earth's historical environment?
Flashcards
Continental Drift Theory
Continental Drift Theory
Continents were once joined, then moved apart over time.
Fossil Evidence (Continental Drift)
Fossil Evidence (Continental Drift)
Similar fossils found on now-separated continents.
Seafloor Spreading
Seafloor Spreading
New ocean floor forms at mid-ocean ridges.
Mid-ocean Ridge
Mid-ocean Ridge
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Pangaea
Pangaea
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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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