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Chapter 6 Science Test (7th Grade)
Cards in this deck (26)
- 1Lithenospherepart of the crust and the upper mantle
- 2Asthenosphereplastic like layer that moves
- 3Platepart of the lithosphere that moves on the asthenosphere
- 4Convergent boundarytwo plates that move together
- 5Divergent boundarytwo plates that move apart from each other
- 6Transform Boundarytwo plates that slide past each other
- 7Mid Ocean Ridgeforms where two oceanic crust divides and may also rise to form a volcanic island
- 8Convection Currentcycle of heating, rising, cooling, and sinking
- 9Pangeathe supercontinent suggested by Wegener in his theory
- 10State the theory of Continental DriftThe theory of Continental Drift is that the continents were together as Pangea and slowly drifted apart.
- 11Scientists studying the ocean floor found ___ bands of magnetismScientists studying the ocean floor found the alternative bands of magnetism.
- 12Plates of the lithosphere float on the ____Plates of the lithosphere float on the asthenosphere.
- 13Seafloor spreading occurs because _____Seafloor spreading occurs because molten material beneath Earth's crust rises to the surface.
- 14Plate motion is caused by _______ inside the EarthPlate motion is caused by convection currents inside the earth.
- 15The hypothesis that continents have slowly moved to their current locations is called _____The hypothesis that continents have slowly moved to their current locations is called continental drift.
- 16In order to complete a convection current, warm mamga ____ then ____ back into the EarthIn order to complete a convection current, warm magma rises then syncs back into Earth.
- 17How fast are the plates moving?The plates move about 1 centimeter per year fast.
- 18What feature is formed where two oceanic plates collide?The feature is formed where two oceanic plates collide is the subduction zone.
- 19Where are the youngest rocks on the ocean floor located?The youngest rocks on the ocean floor located are in the middle of the ocean.
- 20What results from the collision between two continental plates?The results from the collisions between two continental plates are mountains.
- 21Why does the hot, plastic like rock in the asthenosphere rise toward the Earth's surface?The hot, plastic like rock in the asthenosphere rise toward the Earth's surface because as hot plastic like material cools, it becomes denser.
- 22How long ago did Wegener believe that the continents originally broke apart about?Wegener believed that the continents originally broke apart about 220 million years.
- 23What makes up the lithosphere compromised of?The lithosphere is compromised of rocks in the crust and upper mantle that behave as brittle solids.
- 24Explain why continents float higher than the crust of the ocean.Continents float higher than the crust of the ocean because the continents are less dense than the ocean.
- 25Explain some of the other evidence used to support the hypothesis of continental drift.Some of the other evidence used to support the hypothesis of continental drift is that fossils and rocks of the same kind were found in difference continents, such as the Mesosaurus fossil found in South America, and Africa, and similar rocks found in USA, Greenland, and Western Europe, Eastern South, and Western Africa.
- 26Why was Wegener's hypothesis rejected?He did not have a mechanism for how the movement would occur.
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- Chapter 6 Science Test (7th Grade) by Irene Kim
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