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Ch 10 Plate Tectonic
Question | Answer |
---|---|
The youngest rocks on the ocean floor are located at | mid-ocean ridges |
The crust and upper mantle make up Earth's | lithosphere |
The result of plate movement can be seen at | plate boundaries |
The ___ mountains formed by the collision of the Indo-Australian Plate and the Eurasian Plate | Himalaya Mountains |
Evidence that supports the theory of continental drift: | Fossils, rocks, climate clues |
Hypothesis that states that continents have slowly moved to their current locations | continental drift |
Type of boundary where plates move apart | divergent boundaries |
A super continent that existed about 200 million years ago | Pangaea |
The Glomar Challenger provided proof of plate tectonics by providing: | samples of older rock found far from mid-ocean ridges |
Boundary where plates slide past one another | transform boundary |
Boundary where plates move together | convergent boundary |
Seafloor spreading occurs because | molten material beneath Earth's crust rises to the surface |
The man responsible for the theory of continental drift was | Alfred Wegener |
A fossil plant that helps support the theory of continental drift is | Glossopeteris |
Matching ______on different continents are evidence of continental drift. | rock structures |
Bands of rock on seafloor showing alternating magnetic orientation indicate that the Earth's magnetic field has | reversed itself in the past |
A sensitive device used to detect magnetic fields on the seafloor | magnetometer |
______ currents inside the Earth might drive plate motion | Convection currents |
Differences in __________cause hot, plasticlike rock in the asthenosphere to rise toward the Earth's surface. | density |
The Great Rift Valley in Africa is a ________ boundary. | divergent |
Active volcanoes are most likely to form at | convergent oceanic-continental boundaries |
_________ are formed when two continental plates collide. | Mountain ranges |
The ________ is an example of a transform boundacory | San Andreas Fault |
A place where a denser oceanic plate sinks down below a less dense oceanic or continental plate. | Subduction zone |
Person who was responsible for the theory of seafloor spreading | Harry Hess |