Sea Floor Spreading Powerpoint QUIZ

What feature is labeled as 'A' in the ocean floor diagram?

• Continental Shelf

• Mid-Ocean Ridge

• Abyssal Plain

• Ocean Trench

What feature is labeled as 'E' in the ocean floor diagram?

• Volcanic Island

• Abyssal Plain

• Ocean Trench

• Continental Rise

What did Hess propose about the ocean floor?

• It was stationary and unchanging.

• It acted like a "conveyor belt" moving the continents.

• It was shrinking over time.

• It was made of solid rock.

How does sea-floor spreading happen?

• Molten material rises up from the mantle at the mid-ocean ridge.

• Ocean water cools the sea floor rapidly.

• Tectonic plates move towards each other.

• Sea-floor spreading occurs at ocean trenches.

What is the process called where hot material rises and cool material sinks in the Earth's mantle?

• Subduction

• Convection

• Erosion

• Deposition

What is formed at the mid-ocean ridge according to the diagram?

• Mountains

• Trenches

• New oceanic crust

• Volcanoes

What feature is located at the edges of the ocean in the diagram?

• Mid-ocean ridge

• Trench

• Volcano

• Island

What is the term for the upward movement of hot material from the mantle?

• Subduction

• Upwelling

• Erosion

• Deposition

What is the name of the feature where two tectonic plates meet and one is forced below the other?

• Mid-ocean ridge

• Trench

• Volcano

• Fault line

What is the term for the downward movement of cooler material in the mantle?

• Subduction

• Downwelling

• Erosion

• Convection