Ocean Features and Processes

The video provides an overview of the ocean floor, detailing its various landscapes such as the continental shelf, slope, and rise, as well as the abyssal plain. It explains the formation and characteristics of seamounts, ocean trenches, and the mid-ocean ridge. The video also discusses seafloor vents and concludes with a summary of these oceanic features.

What is the continental shelf?

• The underwater edge of a continent

• A steep slope leading to the ocean floor

• A deep trench in the ocean

• A flat area at the bottom of the ocean

What is the abyssal plain known for?

• Being the deepest part of the ocean

• Having a gentle slope

• Being one of the flattest places on Earth

• Containing underwater volcanoes

How are seamounts formed?

• By the accumulation of sand and mud

• Through volcanic activity

• By the erosion of ocean ridges

• Through the movement of tectonic plates

Which islands are an example of seamounts?

• Galapagos Islands

• Hawaiian Islands

• Canary Islands

• Fiji Islands

What is a characteristic feature of ocean trenches?

• They are long, narrow, and V-shaped

• They are formed by sediment buildup

• They are the shallowest parts of the ocean

• They are located on the continental shelf

How deep can ocean trenches extend?

• Up to 3 miles below sea level

• Up to 5 or 6 miles below sea level

• Up to 1 mile below sea level

• Up to 10 miles below sea level

What is the mid-ocean ridge?

• A flat area on the ocean floor

• A mountain range rising above the ocean floor

• A buildup of sediment and sand

• A deep trench in the ocean

What forms seafloor vents?

• Erosion of ocean ridges

• Sediment accumulation

• Volcanic eruptions

• Seawater trickling down from ocean crust

What is the role of the mid-ocean ridge?

• It is a source of hot springs

• It is the flattest place on Earth

• It forms the deepest part of the ocean

• It extends through all major oceans

What happens to seawater in seafloor vents?

• It freezes

• It forms new ocean crust

• It evaporates

• It becomes saturated with minerals