Plate Tectonic Theory (7.E 6.5 & 6.7)

What effect might tectonic plate movement have on the size of an ocean basin?

• An ocean basin becomes larger when new crust is created at transform boundaries.

• An ocean basin becomes larger when new crust is created at convergent boundaries.

• There is no effect on the size of an ocean basin because it is below sea level.

• There is no effect on the size of an ocean basin because crust is created at divergent boundaries and destroyed at subduction zones.

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Heat flow and movement of rock material within Earth are directly responsible for which of the following?

• The fluctuation of average daily temperature

• Formation of mountains and ocean basins

• Increasing concentration of salt in the oceans

• Gradual breaking down of rocky structures

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Alexandra is researching the effects plate tectonics have on the shape of Earth. Which of the following is a result of plate tectonics?

• The species of grass on an island

• Formation of mountains on land

• Earths core temperature

• The amount of precipitation over oceans

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Volcanic eruptions are the result of the movement of tectonic plates. Which of the following most affects the movement of these tectonic plates?

• Radiation from the Sun

• Heat within Earth

• The gravity of the Moon

• The movement of ocean currents

Plate tectonics is helpful in explaining many things we observe on Earth. Which of the following is the best example of something that results from tectonic plate movement?

• Seafloor spreading causes changes in coastlines

• Erosion over time changes the shape of mountains

• The dying out of some plants can affect animal populations

• Rainfall amounts can change from year to year.

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The Calbuco Volcano in southern Chile erupted in 2015. Which of the following is most responsible for this eruption?

• Increase in carbon emissions

• Heat flow within Earths crust

• Melting glaciers in Antarctica

• Erosion of mountains and rocks

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The map provided here shows the location of tectonic plate boundaries in relation to the continents and the oceans of Earth. In which of the number locations would you NOT expect to observe earthquakes?

• Location 1

• Location 2

• Location 3

• Location 4

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The material that emerges from volcanoes includes molten rock. What is it that melts this material?

• The Sun's radiation

• Friction from moving rock layers

• Heat deep within Earth

• The rotation of Earth

The earthquakes experienced in California are related to tectonic plates because these events are the result of what process?

• Two tectonic plates sliding past each other

• Tectonic plates melting as they slide into the mantle

• Tectonic plates being weathered over time

• Two tectonic plates pulling away from each other

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Which of the following is NOT a result of heat flow and movement within the Earth?

• Volcanic eruptions

• Generation of wind patterns

• Creation of ocean basins

• Formation of mountains

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