6th grade Plate Tectonics
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Holes drilled several kilometers into Earth's crust provide direct evidence about Earth's interior in the form of what? | rock samples
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| Geologists obtain indirect evidence about Earth's interior by what? | recording and studying seismic waves
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| What is the correct order (starting from the surface) of Earth's layers? | crust, mantle, outer core, inner core
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| Earth's inner core is _______? | a dense ball of solid metal
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| Heat transfer within a fluid takes place by what? | convection currents
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| According to Wegener's hypothesis of continental drift, _____________________. | the continents were once joined together in a single landmass
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| What is Pangaea? | The name of the supercontinent that existed millions of years ago
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| Which type of evidence was NOT used Alfred Wegener to support his continental drift hypothesis? | evidence from human remains
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| Why did most geologists reject Alfred Wegener's idea of continental drift? | Wegener could not identify a force that could move the continents
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| In sea-floor spreading, molten material rises from the mantle and erupts where? | along mid-ocean ridges
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| How did scientists discover that rocks farther away from the mid-ocean ridge were older than those near it? | by determining the age of rock samples obtained by drilling on the sea floor
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| What did scientists notice when they observed the mid-ocean ridge? | pillow-shaped rocks formed by the rapid hardening of molten material
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| The process in which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is known as what? | subduction
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| Most geologists think that the movement of Earth's plates is caused by what? | convection currents in the mantle
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| The geological theory of ________________ states that pieces of Earth's lithosphere are in constant, slow motion. | plate tectonics
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| What is a place where two plates slip past each other, moving in opposite directions? | transform boundary
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| Where does a rift valley form? | divergent plate boundary
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| Using data from seismic waves, geologists have learned that Earth's interior is made up of several what? | layers
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| Earth's magnetic field is a result movements in the ____________. | outer core
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| Scientists think that convection currents flow in Earth's _________________. | mantle
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| A collision between two pieces of continental crust at a converging boundary produces a _________________. | mountain range
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| The place where two plates come together is known as a ___________________. | convergent boundary
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| What forms when continental plates pull apart at a divergent boundary on land? | rift valley
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| What part of the mantle is made of soft rock that bends like plastic? | asthenosphere
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| In the mantle, heat is transferred as soft rock flows slowly in circles is known as what? | convection currents
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| What process continually adds new crust to the ocean floor along both sides of the mid-ocean ridge? | sea floor spreading
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| Subduction occurs where the oceanic crust bends down toward the mantle at a _____________. | deep ocean trench
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| The lithosphere is broken into sections called _______________ that float on top of the atmosphere. | plates
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| What is the process in which the ocean floor sinks beneath a deep-ocean trench and back into the mantle? | subduction
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| What is made of liquid iron and nickel and moves to produce Earth's magnetic field? | outer core
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Created by:
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