We all know the ocean is huge. But what else do we know? Ocean Facts for Kids offers just a few more interesting facts that you and your kids might not already know. For instance, almost 98% of all the water on the earth is in the ocean. The average depth is 2.3 miles deep. And that's just the average! One of the deepest parts is at the Mariana Trench, which is 36,198 feet deep—almost seven miles!

Do you know why there are waves? The most common type of wave is a surface wave. These are the ones we commonly see with the white tips that crash into the shore. These waves are caused by wind blowing across the surface of the ocean. Other waves occur because of gravity. These waves are called tides, which are affected by the moon's location in relation to the earth. And waves can even happen because of underwater explosions from volcanoes beneath the surface of the ocean. These explosions cause tsunamis!

Large parts of the ocean remain a mystery. Marine biologists estimate that there are between 700,000 and 1 million species that live in this ginormous pool. They also think that two-thirds of those species haven't even been discovered yet! That estimate doesn't include the millions of microorganisms living in the ocean.

We hope you and your student(s) enjoyed learning about the world's beautiful ocean! If you want to learn even more, head over to our website and download one of our many lesson plans about the ocean, full of activities, worksheets, and more!

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