Seafloor Spreading and Plate Tectonics #2

What type of boundary occurs when tectonic plates move apart?

• Divergent boundary.

• Convergent boundary.

• Transform boundary.

• Subduction boundary.

What is formed when two ocean plates separate?

• Mid-ocean ridge.

• Ocean trench.

• Continental shelf.

• Seamount.

What is continental drift?

• The theory that continents are fixed in place.

• The hypothesis that continents move across the Earth's surface over geological time.

• The idea that continents were once part of a single landmass.

• The concept that ocean currents shape the continents.

What causes Earth's tectonic plates to move?

• Convection currents in the mantle.

• Gravitational pull from the moon.

• Earth's rotation on its axis.

• Magnetic fields generated by the core.

Why does hot mantle rise?

• Hot mantle is less dense.

• Hot mantle is more viscous.

• Hot mantle is heavier than cold mantle.

• Hot mantle contains more minerals.

What is the significance of the mid-ocean ridge?

• It is a divergent boundary where new oceanic crust is created.

• It is a convergent boundary where tectonic plates collide.

• It is a transform boundary where plates slide past each other.

• It is a location where ocean currents are strongest.

What evidence supports the theory of plate tectonics?

• Fossil distribution, geological formations, and ocean floor mapping.

• The presence of volcanoes in the ocean.

• The existence of mountain ranges on land.

• The occurrence of earthquakes in urban areas.

What is the role of convection currents in the mantle?

• They drive the movement of tectonic plates.

• They cool the Earth's surface.

• They create ocean currents.

• They form mountain ranges.

What is the theory that describes the movement of Earth's plates?

• Plate Tectonics

• Continental Drift

• Seafloor Spreading

• Geosyncline Theory

What is a convergent boundary?

• A boundary where two tectonic plates collide.

• A boundary where two tectonic plates move apart.

• A boundary where tectonic plates slide past each other.

• A boundary that forms when tectonic plates are stationary.