What percentage of the Earth's surface is covered by oceans?

Which is the largest ocean on Earth?

What is the name for the movement of ocean water caused by wind, tides, and differences in water density?

Which marine animal is known as the 'unicorn of the sea'?

What is the smallest ocean in the world?

Which of the following is a primary producer in the ocean's food web?

What is the term for a community of living organisms interacting with their environment in the ocean?

Which ocean phenomenon is characterized by a rise in sea surface temperatures in the central and eastern Pacific?

What is the primary cause of ocean tides?

Which of these is a type of coral reef?