Exploring the Atlantic Ocean

What is the name of the ridge that marks the boundary between several enormous tectonic plates in the Atlantic Ocean?

• The Rocky Mountains

• The Mid-Atlantic Ridge

• The Andes Ridge

• The Pacific Ridge

What happens to the seawater outside the submersible as it goes deeper into the Atlantic Ocean?

• It gets lighter and lighter

• It gets warmer and warmer

• It gets darker and darker

• It gets shallower and shallower

Where are there more mountains, according to the text?

• On the seafloor

• On all of Earth's continents

• On all of Earth's islands

• On the moon

What is the Mid-Atlantic Ridge?

• A long, rugged underwater mountain range

• A large desert

• A tall volcano

• A deep river

What happens as the plates move?

• The continents move too

• The oceans disappear

• The mountains shrink

• The weather changes

What has built up high walls of basalt on either side of the Mid-Atlantic Ridge rift?

• Erupting lava

• Earthquakes

• Wind erosion

• Rainwater

How deep is the rift in the Mid-Atlantic Ridge compared to?

• The Grand Canyon

• Mount Everest

• The Mariana Trench

• The Amazon River

What do mid-ocean ridges form under the ocean?

• A near-continuous chain of underwater mountains

• A group of islands

• A single volcano

• A deep trench

What do hydrothermal vents release into the ocean?

• Hot, mineral-rich water

• Cold, fresh water

• Oil and gas

• Sand and gravel

What is exciting for scientists when exploring hydrothermal vents?

• Finding a new vent

• Catching fish

• Collecting seashells

• Swimming with dolphins