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pressure


the force produced by pressing on something

The weight of water above causes crushing pressure at the ocean’s floor.

  pressure

submersible


an underwater vehicle

Scientists travel in the submersible Alvin to explore the deep sea.

submersible

hydrothermal vent


an opening in the seafloor where hot fluid escapes, warming the surrounding water

Life is able to survive in the deep sea because of the warmth given off by hydrothermal vents.

hydrothermal vent

magma


melted rock beneath Earth’s surface

A layer hot magma lies beneath Earth’s surface.

  magma

microbes


creatures too small to be seen without special tools, like a microscope

You need a microscope to be able to see microbes.

microbes

food web


a network of plants and animals in which each feeds on the one below it

Microbes form the base of the food web in the deep sea.

  food web
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