What is sea-floor spreading?
Lab- An Expedition to Sea floor

Flashcard
•
Science
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The process by which new ocean crust forms as magma rises to the surface at mid-ocean ridges, pushing older crust away.
2.
FLASHCARD QUESTION
Front
What are mid-ocean ridges?
Back
A chain of underwater mountains formed by tectonic plate movements and volcanic activity.
3.
FLASHCARD QUESTION
Front
What technology was used during WWII to map the seafloor?
Back
Sonar, which uses sound waves to detect objects underwater and create maps.
4.
FLASHCARD QUESTION
Front
What is the significance of mid-ocean ridges in plate tectonics?
Back
They are the sites where tectonic plates diverge, leading to the formation of new oceanic crust.
5.
FLASHCARD QUESTION
Front
Define continental drift.
Back
The gradual movement of continents across the Earth's surface through geological time.
6.
FLASHCARD QUESTION
Front
What is the relationship between sea-floor spreading and continental drift?
Back
Sea-floor spreading contributes to continental drift by creating new oceanic crust that pushes continents apart.
7.
FLASHCARD QUESTION
Front
What are tectonic plates?
Back
Large sections of the Earth's lithosphere that move and interact at their boundaries, causing geological activity.
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