Plate Tectonics and Continental Drift

What is the theory that explains how the Earth's lithosphere is divided into several large and small plates that are constantly moving?

• Continental Drift

• Seafloor Spreading

• Plate Tectonics

• Pangaea

What is the driving force behind plate tectonics?

• Convection currents in the asthenosphere

• Gravitational pull from the moon

• Volcanic eruptions

• Friction between tectonic plates

What are the three types of plate boundaries?

• Oceanic boundaries, continental boundaries, and island boundaries

• Subduction boundaries, collision boundaries, and sliding boundaries

• Divergent boundaries, convergent boundaries, and transform boundaries

• Tectonic boundaries, fault boundaries, and rift boundaries

What happens at a convergent plate boundary?

• Two tectonic plates sink beneath one another.

• Two tectonic plates move apart and create a gap.

• Two tectonic plates slide past each other horizontally.

• Two tectonic plates collide and are forced together.

What is a subduction zone?

• A subduction zone is a region where two tectonic plates collide and create a mountain range.

• A subduction zone is a region where tectonic plates move away from each other, creating a rift valley.

• A subduction zone is a region where tectonic plates slide past each other, causing earthquakes.

• A subduction zone is a region where one tectonic plate is forced underneath another plate into the Earth's mantle.

What are convection currents?

• Circular motion of fluids caused by differences in pressure and viscosity.

• Circular motion of fluids caused by differences in temperature and density.

• Linear motion of fluids caused by differences in temperature and density.

• Circular motion of solids caused by differences in temperature and density.

What are mid-ocean ridges?

• Underwater valleys formed along tectonic plate boundaries.

• Underwater mountain ranges formed along tectonic plate boundaries.

• Underwater caves formed by erosion.

• Underwater trenches formed by volcanic activity.

What process occurs at mid-ocean ridges?

• continental drift

• subduction

• volcanic eruptions

• seafloor spreading

Which layer of Earth is located above the outer core?

• crust
• inner core
• mantle
• lithosphere

What part of the earth is a layer of rock that comprises 67% of Earth’s mass?

• mesosphere
• mantle
• asthenosphere
• lithosphere