Fosa

The video explains the concept of subduction boundaries where one tectonic plate sinks under another, forming long and deep ocean trenches. These trenches are often parallel to volcanic island arcs. The deepest known parts of the ocean are trenches, such as the Challenger Abyss in the Marianas Trench, which is 11,000 meters deep.

What occurs at a subduction boundary?

• Two tectonic plates move apart.

• One tectonic plate slides past another.

• One tectonic plate sinks under another.

• Two tectonic plates collide and form mountains.

How are ocean trenches typically aligned?

• Perpendicular to volcanic island arcs.

• In a circular pattern around continents.

• Randomly scattered across the ocean floor.

• Parallel to volcanic island arcs.

What is a notable feature of ocean trenches?

• They are elevated and rocky.

• They are flat and sandy.

• They are deep and narrow.

• They are shallow and wide.

Which trench contains the Challenger Abyss?

• Puerto Rico Trench

• Java Trench

• Tonga Trench

• Marianas Trench

What is the approximate depth of the Challenger Abyss?

• 5000 meters

• 7000 meters

• 9000 meters

• 11000 meters