What technology uses sound waves to map the ocean floor?

Sonar Radar GPS Infrared imaging

Where is the deepest point on Earth — the Challenger Deep — located?

Mariana Trench, Pacific Ocean Mid-Atlantic Ridge Puerto Rico Trench, Atlantic Ocean Java Trench, Indian Ocean

What is a seamount?

An underwater mountain formed by volcanic activity that doesn't reach the surface A trench formed by two tectonic plates colliding A flat, elevated plateau on the deep ocean floor A shallow reef that is partly exposed at low tide

What is the Mid-Ocean Ridge?

A global chain of underwater mountains where tectonic plates diverge and new seafloor is created A series of deep trenches where plates collide A shallow area in the middle of the ocean used for navigation A current that runs along the center of each ocean

What drives the movement of tectonic plates?

Convection currents in Earth's mantle Ocean currents pushing against the seafloor The Moon's gravity Wind patterns on the ocean surface

What is an abyssal plain?

A vast, flat region of deep ocean floor covered by fine sediment A shallow coastal shelf near a continent A volcanic mountain range on the seafloor A warm, nutrient-rich surface zone near the equator

What is the continental shelf?

A shallow, gently sloping underwater extension of a continent The steep slope that drops off from the continental shelf The deepest part of the ocean near a continent A rocky plateau found in the middle of the ocean

How does plate tectonics shape ocean basins over time?

Moving plates create and destroy ocean floor, changing the size and shape of oceans over millions of years Plate tectonics only affects land features, not the ocean floor Plates have no effect because the ocean floor is too heavy to move Tectonic plates create ocean currents but do not change ocean shape

What is an ocean trench?

A long, narrow, very deep depression formed where one tectonic plate slides under another A shallow channel between two islands An underwater canyon carved by rivers during ice ages A gap in the Mid-Ocean Ridge caused by an earthquake

Why is mapping the ocean floor scientifically important?

It helps us understand Earth's geological history, locate ecosystems and resources, and plan conservation It is only useful for military submarine navigation It allows us to measure ocean salinity accurately It helps ships avoid underwater obstacles only