How the Tectonic Plates Move - Study Course Edition

What was Alfred Wegener's main idea about the Earth's continents?

• They are fixed in place and never move.

• They fit together like puzzle pieces and have moved over time.

• They are constantly growing larger.

• They are slowly sinking into the ocean.

What causes the magma in the Earth's mantle to rise and sink, creating a convection current?

• The moon's gravitational pull.

• Differences in temperature and density of the magma.

• The rotation of the Earth.

• Pressure from the ocean water.

In the process of Ridge Push, what causes the older, denser rock to slide away from the mid-ocean ridge?

• The pull of gravity on the denser rock.

• The suction created by sinking plates.

• The direct force of rising magma.

• The impact of meteorites.

Which type of plate boundary occurs when two tectonic plates slide past each other in opposite directions?

• Convergent plate boundary

• Divergent plate boundary

• Transform plate boundary

• Subduction plate boundary