Plate Tectonics
Plate Tectonics 2
Earthquakes
Volcanoes
Earth's Layers
100
Name the three types of plate boundaries and show the hand movements.
What is convergent, divergent, and transform
100
Today, geologists agree that Earth’s crust is broken into several large tectonic plates. Which concept was most responsible for helping to form the theory of plate tectonics? A.The inner core is the hottest of the layers of Earth. B.Mountains slowly wear down due to the actions of water and wind. C.Tidal forces from the Moon affect the movement of Earth’s crust. D.The sea floor is spreading outward from large underwater ridges.
What is D.The sea floor is spreading outward from large underwater ridges.
100
What what direction does transform boundaries move?
What is they slide past each other.
100
What is the difference between magma and lava?
What is magma is below the earth's surface and lava is what flows on the surface of earth.
100
. Earth’s inner core is a A.layer of hot rock B. Dense ball of solid metal C. a layer of rock that forms Earth’s outer skin D. Layer of Molten metal
What is B. Dense ball of solid metal
200
Alfred Wegener first proposed his theory of continental drift in 1912. Which set best describes evidence he used to support this theory? A.the shape of some continents, finding similar fossils on separate continents B.seafloor spreading, discovery of hot spots C.seafloor spreading, discovery of the Ring of Fire in the Pacific Ocean D.the shape of some continents, a convection current model for the mantle
What is A.the shape of some continents, finding similar fossils on separate continents
200
The most recent supercontinent, Pangaea, formed about 250 million years ago. Scientists have held several different theories about how Pangaea changed into the present-day continents. Which statement best explains the current scientific understanding of this process? A.Pangaea broke apart into smaller continents over time due to the movement of tectonic plates. B.Seafloor spreading caused ocean levels to decrease and revealed the current continents around Pangaea. C.Volcanic activity broke apart Pangaea and caused the continents to drift away from each other. D.Pangaea became present-day continents due to random drifting of large land masses that broke apart.
What is A.Pangaea broke apart into smaller continents over time due to the movement of tectonic plates.
200
Where are most of the Earthquakes on earth found? a. middle of the continent b. middle of the ocean and along the edges of continents c. California d. United States of America
What is b. middle of the ocean and along the edges of continents
200
Which convection force causes magma to rise in the ocean floor and form mid-ocean ridges? a. slab pull b. ridge push c. basal drag d. convection drag
What is b. ridge push
200
Which density layer in the Earth is the thinnest? A. inner core B. outer core C. mantle D. crust
What is D. crust
300
The detection of seafloor spreading helped lead to the theory of plate tectonics. What evidence was key to identifying that ocean plates moved over time? A.the discovery of the Ring of Fire around the Pacific Ocean B.bands of ocean crust showing magnetic field reversals C.lava emerging from the ocean floor D.the discovery of deep ocean trenches near coastlines
What is B.bands of ocean crust showing magnetic field reversals
300
The theory of continental drift was proposed in the early 1900s, but was not accepted by most geologists. Which statement best explains why this theory was not accepted? A.There was little evidence that separate continents had once been together. B.Geologists believed Earth had not existed long enough for continental drift to have occurred C.There was no known force large enough to move pieces of Earth’s crust. D.No one had ever directly observed continents moving.
What is C.There was no known force large enough to move pieces of Earth’s crust.
300
What type of plate boundary leads to earthquakes but not generally volcanic eruptions? A.divergent plate boundary B.convergent plate boundary C.transform plate boundary D.continental rift zone
What is C.transform plate boundary
300
Why do the islands of Indonesia have many volcanoes and experience frequent earthquakes? A.The islands are located at the boundaries of tectonic plates. B.Many hotspots are found near the islands. C.Magma is less abundant under Earth’s crust near the islands. D.The islands are affected by the interaction of the land with the ocean.
What is A.The islands are located at the boundaries of tectonic plates.
300
Which density layers of Earth are fluid in nature? A.outer core, inner core B.mantle, outer core, inner core C.mantle, inner core D.mantle, outer core
What is D.mantle, outer core
400
Which geologic activity is most likely to occur when two lithospheric plates converge? A.Volcanic islands form over a hot spot in the ocean. B.An underwater ridge forms in the middle of an ocean. C.A series of valleys form between low mountains. D.Mountains form along the edge of a continent.
What is D.Mountains form along the edge of a continent.
400
What is a common result of the collision of two continental plates? A. very long fault lines B.formation of island chains C.lava flows into valleys D.folded rock layers
What is A. very long fault lines
400
Earthquakes are common in southern California near the San Andreas fault. Which process causes earthquakes along this fault? A.lava flowing into the fault B.mountain building near the fault C.tectonic plates sliding past each other D.waves in the crust crashing into the fault
What is C.tectonic plates sliding past each other
400
Which location has both frequent earthquakes and active volcanoes? A.an area near a subduction zone B.an area near a hot spot in the mantle C.an area near oceanic mountain chains D.an area near a continental rift
What is A.an area near a subduction zone
400
Which pattern of temperature and density change is found in the layers of the Earth, moving from the crust to the inner core? A.temperature decreases, density decreases B.temperature decreases, density increases C.temperature increases, density decreases D.temperature increases, density increases
What is D.temperature increases, density increases
500
Plate tectonics helps explain the evidence for continental drift. India is on a continental plate that is moving north and colliding with Asia. What is the most likely result of the collision of two continental plates? A.sideways movement along a fault B.mountain building C.subduction of both plates D.continental rift formation
What is B.mountain building
500
The Hawaiian Islands were created by volcanic eruptions, and Hawaii still has active volcanoes. Which tectonic process best explains the formation of the string of islands that make up Hawaii? A.a drifting hot spot deep in the ocean B.movement of an oceanic plate over a hot spot C.subduction of two oceanic plates that are colliding D.seafloor spreading forming an ocean mountain chain
What is C.subduction of two oceanic plates that are colliding
500
The San Andreas Fault is located in California, where many earthquakes occur. Which process is most likely to cause an earthquake along an active fault such as the San Andreas? A.the movement of two plates B.a release of magma C.a sudden discharge of heat D.the melting of the mantle
What is A.the movement of two plates
500
Most of Earth’s volcanoes above sea level are located in an area around the Pacific Ocean called the “Ring of Fire.” Which process best describes why there are so many volcanoes in this area? A.One tectonic plate is moving away from another tectonic plate. B.One tectonic plate is sliding under another tectonic plate. C.Two continental plates are sliding past each other. D.Two continental plates are colliding.
What is B.One tectonic plate is sliding under another tectonic plate.
500
which process explains why less dense, hot magma rises to the surface to displace more dense, cooler magma? a. diffusion b. radiation c. convection d. conduction
What is c. convection
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