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Chap.1 Section 3-5
Chapter 1 Section 3
Question | Answer |
---|---|
continental drift | A theory that continents can drift apart from one another and have done so in the past. |
Pangea | An extremely large landmass when all continents were connected together |
fossil | The imprint or hardened remains of a plant or animal that lived long ago. |
deep-ocean trench | A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle. |
mid-ocean ridge | Giant undersea mountain range extending around the world like the seams of a baseball. |
sonar | A system that uses the reflection of underwater sound waves to detect objects. |
seafloor spreading | the idea that the middle of the ocean is spreading apart, moving very slowly in opposite directions. |
subduction | Process in which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent boundary.. |
plate | A slab of Earth's lithosphere that can move around on the planet's surface. |
scientific theory | A well-tested concept that explains a wide range of observations about a particular scientific question. |
plate tectonics | The movement of the earth’s upper mantle and crust. |
fault | A break in Earth's lithosphere where one block of rock moves toward, away from, or past another. |
transform boundary | Two plates sliding horizontally past each other. |
divergent boundary | Place where two of Earth's tectonic plates are moving apart |
rift valley | a deep valley that forms when two plates drift apart |
convergent boundary | a boundary between lithospheric plates where the plates move toward one another and one plate is recycled into the mantle |