Test Review 3 Grade 6

The movement of hot rock rising and cooling rock sinking in the mantle carries heat from Earth’s core toward the crust. What is this heat transfer process called?

• Convection

• Conduction

• Plate tectonics

• Radiation

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Plates usually move a few centimeters every year. Movement of heated material in Earth's interior causes the plates to move. Which of the following statements best describes the events leading to the plate movement?

• Subsurface events driven by energy from the sun.

• Surface events driven by energy from the sun.

• Subsurface events driven by energy from Earth’s core.

• Surface events driven by energy from Earth’s core.

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Which of the following methods or tools would be the most useful to a geologist constructing an explanation of mountain building?

• Geologists use models to show what happens to the Earth when mountains are formed.

• Geologists collect data on the decreasing heights of mountain ranges each year.

• Geologists study the effects of weathering and erosion in mountain ranges.

• Geologists construct topographic maps of mountain ranges.

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Under Earth’s crust is an enormous amount of hot molten rock, If hot rock rises, why don’t volcanic eruptions happen all the time?

• Hot molten rock that rises through the mantle continues rising and erupts through the crust at cracks in Earth’s crust called transform boundaries.

• Hot molten rock that rises through the mantle continues rising and erupts through the surface at cracks in Earth’s crust called divergent and convergent boundaries.

• Hot molten rock does not cause volcanoes because the hot molten rock sinks while the cooler rock rises.

• Hot molten rock does not cause volcanoes because the hot molten rock sinks while the cooler rock rises.

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The diagram shows the oceanic plate sinking beneath the continental plate, and melting rock being squeezed up toward the surface. Which statement best describes the potential results of tectonic plates moving towards each other at a convergent boundary?

• Volcanoes could occur, but mountain building would not be a result.

• Mountain building could occur, but volcanoes would not be a result.

• A volcano is the only possible result.

• Volcanoes, earthquakes, and mountain building could result.

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If the mantle did not have cool rock sinking and hot rock rising, there would not be hot magma rising to the surface as volcanic eruptions, and the flow responsible for moving the tectonic plates would not occur. Tectonic movement has to have convection currents occuring.

• True

• False

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Which hypothesis below would be best investigated using systematic observations instead of an experiment?

• A biologist’s hypothesis that the use of fertilizer increases the growth of grass

• A geologist’s hypothesis that acid rains weathers sedimentary rock more rapidly than igneous rock

• A geologist’s hypothesis about how the Grand Canyon formed

• A biologist’s hypothesis that increases in average temperatures causes an increase in honeybee population

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T/F As radiation currents in the mantle move plates on the crust in opposite directions, magma from the mantle rises through the crust and cools to create new oceanic crust.

• True

• False

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Heat transfers from the outer core to the mantle by conduction, then through the mantle toward the crust by convection.

• True

• False

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Earthquakes can cause major changes to Earth’s surface to occur very quickly. Based on the map and the principles of how tectonic plates cause earthquakes, in which of the following places is an earthquake most likely to occur?

• in the center of the Eurasian Plate

• along the edges of the Philippine Plate and the Eurasian Plat

• in the center of the Pacific Ocean

• in Antarctica

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