Sea-Floor Spreading

What is the relationship between sea-floor spreading and earthquakes?

• Sea-floor spreading has no effect on earthquakes.

• Sea-floor spreading can cause earthquakes due to the movement of tectonic plates at mid-ocean ridges.

• Sea-floor spreading only occurs in areas with no earthquakes.

• Sea-floor spreading prevents earthquakes from occurring.

Where does sea-floor spreading occur?

• At mid-ocean ridges, which are underwater mountain ranges.

• In deep ocean trenches.

• Along continental shelves.

• At river deltas.

How does sea-floor spreading support the theory of plate tectonics?

• Sea-floor spreading causes tectonic plates to collide and form mountains.

• Sea-floor spreading provides evidence for the movement of tectonic plates, as new crust is created and old crust is recycled.

• Sea-floor spreading is unrelated to tectonic plate movement.

• Sea-floor spreading only occurs in the Pacific Ocean.

What is subduction?

• A process where two tectonic plates collide and create mountains.

• A process where one tectonic plate moves under another and sinks into the mantle.

• A method of measuring tectonic plate movement over time.

• A phenomenon that occurs when tectonic plates slide past each other.

What is sea-floor spreading?

• Sea-floor spreading is the process by which new oceanic crust is formed at mid-ocean ridges as magma rises from the mantle and solidifies.

• Sea-floor spreading is the phenomenon where tectonic plates collide and create mountain ranges.

• Sea-floor spreading refers to the erosion of oceanic crust due to wave action and sediment deposition.

• Sea-floor spreading is the process of ocean water evaporating and leaving behind salt deposits.

What is the effect of sea-floor spreading on ocean basins?

• Sea-floor spreading causes ocean basins to widen over time.

• Sea-floor spreading leads to the formation of new islands.

• Sea-floor spreading decreases the size of ocean basins.

• Sea-floor spreading has no effect on ocean basins.

What evidence supports sea-floor spreading?

• The age of rocks, magnetic patterns on the ocean floor, and the distribution of fossils.

• The presence of underwater volcanoes and ocean currents.

• The thickness of sediment layers and the temperature of ocean water.

• The movement of tectonic plates and the formation of mountain ranges.

What is a mid-ocean ridge?

• An underwater mountain range formed by plate tectonics, where sea-floor spreading occurs.

• A type of coral reef found in shallow waters.

• A deep-sea trench formed by tectonic plate subduction.

• A volcanic island chain formed by hotspot activity.

What is the significance of the ocean floor in sea-floor spreading?

• The ocean floor is continuously renewed through the process of sea-floor spreading, which adds new material.

• The ocean floor remains unchanged over time, preserving ancient geological features.

• The ocean floor is primarily composed of sediment that prevents new material from forming.

• The ocean floor acts as a barrier to prevent ocean currents from mixing.

What geological activity is associated with mid-ocean ridges?

• Volcanic and earthquake activity.

• Tsunami generation.

• Mountain formation.

• Sediment deposition.