(8) Ch 5 Plate Tectonics

According to Wegener’s hypothesis of continental drift,

• Earth’s surface is made up of seven major landmasses.

• the continents do not move.

• Earth is slowly cooling and shrinking.

• the continents were once joined together in a single landmass.

Particles of hot soup rise slowly in a pot simmering on a stove. As the hot soup nears the surface, it begins to cool. The cooler soup sinks, forming a constant movement of soup that moves energy toward the surface of the pot. This constant movement of the soup in the pot is called a(n)

• magnetic field.

• convection current.

• energy system.

• conduction loop.

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Any trace of an ancient organism that has been preserved in rock is called a

• landform.

• fossil.

• continent.

• landmass.

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The transfer of energy through empty space is called

• conduction.

• radiation.

• convection.

• subduction.

In sea-floor spreading, molten material rises from the mantle and erupts

• along the edges of all the continents.

• along mid-ocean ridges.

• in deep-ocean trenches.

• at the north and south poles.

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Old oceanic crust is more dense than new oceanic crust because it is

• hot.

• moving toward a deep-ocean trench.

• cool.

• closer to the mid-ocean ridge.

In which location would you most likely find volcanoes?

• far from plate boundaries

• along transform boundaries

• where two continental plates collide

• along mid-ocean ridges and where a plate is subducted

The geological theory that states that pieces of Earth’s lithosphere are in constant, slow motion is the theory of

• subduction.

• plate tectonics.

• deep-ocean trenches.

• sea-floor spreading.

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A place where two plates slip past each other, moving in opposite directions, is known as a

• transform boundary.

• divergent boundary.

• convergent boundary.

• rift valley.

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A collision between two pieces of continental crust at a converging boundary produces a

• mid-ocean ridge.

• deep-ocean trench.

• rift valley.

• mountain range.

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