The Ultimate Ocean and Marine Life Quiz
by Staff
Oceans cover most of the Earth's surface. They include a vast diversity of life, everything from plants to large mammals. Oceans represent a truly undiscovered world for most people. Take this quiz and learn more about ocean life.

The oceans cover ______ of the Earth's surface.

  • 60 percent
  • 70 percent
  • 90 percent

Which ocean is the largest?

  • Pacific ocean
  • Atlantic ocean
  • Indian ocean

Which ocean basin is the most geologically active?

  • Pacific ocean
  • Atlantic ocean
  • Indian ocean

How does water move around the world?

  • wind
  • gravity
  • both of the above

Ocean water moves:

  • from north to south
  • from south to north
  • in a circular pattern

What are thermohaline currents?

  • cold water currents from the arctic
  • warm water currents from Africa
  • currents that move up and down in the ocean

What type of water is more dense?

  • polar, cold water
  • equator, hot water
  • water close to the shore

What are basalts?

  • volcanic rocks on the ocean floor
  • volcanic eruptions under the water
  • volcanic ash found in the ocean

What are the abyssal plains?

  • flat areas of the ocean floor
  • mountainous areas of the ocean floor
  • rocky and gagged areas of the ocean floor

What property of water does salt alter?

  • freezing point
  • boiling point
  • both of the above

What are the main categories of sea life?

  • swimmers and non-swimmers
  • swimmers, floaters and creatures on the sea floor
  • fish, mammals and microscopic creatures

What are phytoplankton?

  • a larger version of plankton
  • organisms that eat plankton
  • microscopic algae

What are zooplankton?

  • small worms and jellyfish
  • clams
  • both of the above

What are examples of benthos?

  • lobsters
  • small fish
  • shrimp

What type of creatures live near hydrothermal vents in the deep sea?

  • worms
  • fish
  • both of the above

What sea life is at the very bottom of the food chain?

  • phytoplankton
  • microscopic fish
  • both of the above

What do sea sponges eat?

  • phytoplankton
  • plankton
  • waste products from other fish

What sea creature may have cancer-fighting properties?

  • sponge
  • sea-squirt
  • both of the above

Seaweed compounds are added to:

  • beer
  • ice cream
  • both of the above

Where does offshore oil drilling occur?

  • the Persian Gulf
  • the North Sea
  • both of the above