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Questions and Answers
What is the theory that suggests the continents were once a single mass and have since drifted apart?
What is the theory that suggests the continents were once a single mass and have since drifted apart?
- Continental drift theory (correct)
- Seafloor spreading
- Pangea theory
- Plate tectonics
What was the name of the supercontinent that existed about 240 million years ago?
What was the name of the supercontinent that existed about 240 million years ago?
- Pangaea (correct)
- Gondwana
- Rodinia
- Laurasia
What are the three types of evidence supporting the continental drift theory?
What are the three types of evidence supporting the continental drift theory?
- Climate change, ocean currents, and atmospheric pressure
- Seafloor spreading, volcanic activity, and earthquake patterns
- Rock and mountain correlation, fossil correlation, and apparent fit of the continents (correct)
- Magnetic field reversals, plate boundaries, and subduction zones
What causes the movement of plates on the Earth's surface?
What causes the movement of plates on the Earth's surface?
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What is the Pacific Ring of Fire an example of?
What is the Pacific Ring of Fire an example of?
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Study Notes
- Continental drift theory suggests the continents were once a single mass and have since drifted apart.
- Pangea was the supercontinent that existed about 240 million years ago.
- Evidence supporting the theory includes rock and mountain correlation, fossil correlation, and apparent fit of the continents.
- Plate tectonics explains how major landforms are created due to Earth's subterranean movements.
- The surface of the Earth is divided into 7 major and 8 minor plates.
- Plates move due to convection currents and plate boundaries are where most earthquakes and volcanoes occur.
- Divergent boundaries occur when two plates move away from each other.
- Convergent boundaries occur when two plates come together, creating mountain ranges or deep seafloor trenches.
- Transform plate boundaries occur when two plates slide past each other.
- The Pacific Ring of Fire is an example of a convergent boundary.
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