Unit5PostRev

The edge of one plate sinking beneath the edge of another plate is a process called

• Tectonics

• Subduction

• Eruptions

• Faults

Which statement BEST describes one difference between Earth's mantle and crust?

• The mantle is less dense than the crust

• The mantle is cool compared to the crust

• The mantle is hot compared to the crust

What causes the mountains to form?

• two oceanic plates spreading at a divergent boundary

• two oceanic plates colliding at a convergent boundary

• two continental plates spreading at a divergent boundary

• two continental plates colliding at a convergent boundary

How is the asthenosphere and lithosphere different?

• Lithosphere is the hard and brittle outer layer & Asthenosphere is softer and hotter and located underneath lithosphere

• Lithosphere is the soft and hot outer layer; Asthenosphere is hard and brittle and located below the lithosphere

• Lithosphere is located below the asthenosphere is hard and brittle

• Lithosphere is located below the asthenosphere and is softer and hotter;

Tectonic plates that make up Earth's crust move because of __________ in the mantle.

The crevice along the fault is most likely caused by which event?

• earthquake

• hurricane

• tornado

• thunderstorm

Which layer is least dense?

• inner core

• mantle

• crust

• outer core

Describe heat flow and movement in the mantle.

• When magma heats, it becomes less dense and rises

• When magma heats, it becomes more dense and rises

• When magma heats, it becomes less dense and sinks

• When magma heats, it becomes more dense and sinks

Where do earthquakes and volcanoes occur according to the theory of plate tectonics?

• above the surfaces of plates

• along plate boundaries

• in the outer regions of plates

• in the center of the plates

Where can an active volcano most likely be found?

• North or South Pole

• where two tectonic plates meet

• where the Earth's crust is the thickest

• anywhere along the equator