The Ocean - Homework Help - Kids Learning Games - Online Learning for Kids

What is a "sea" compared to an "ocean"?
A sea is a branch of one of the five "oceans". A sea is partially enclosed by land. For example, the Indian Ocean is...

Why is it easier to float in salt water?
Salt water is denser than fresh water. Because of this, it can "hold up" more weight, making it easier for you to...

Why is the ocean salty?
It is salty because it has a lot of salt in it! Salt is a mineral that is found in soil and rocks, too. Flowing water...

Why do seashells sound like the ocean when you hold them next to youe ear?
When you put a seashell up to your ear, what you hear is not the ocean. The sound comes from inside your own ear. The...

How can plants deep in the ocean grow without sunlight?
Good question! Sunlight can penetrate the ocean to a depth of about 600 feet. This is called the "euphotic zone."...

Why is the ocean blue?
Believe it or not, no one is really sure why the ocean is blue! As you may know, sunlight, or "white" light, is...

Why is the ocean salty but rivers aren't?
As rivers run toward the ocean, they pick up salt and other minerals from the rocks and sand they pass by. The...

How many oceans are there in the world?
There is really only one big ocean. One can sail in a boat in every known "ocean" and "sea", which means they are all...

Can you drink sea water?
Water from the sea is too salty to drink. Although your body needs salt, it is possible to have too much of it. See,...

What's the deepest ocean in the world?
The deepest ocean in the world is the Pacific Ocean, with an average depth of 13,215 feet. The greatest known depth...