Oceans!!!!!!

 Hello I'm back and today I am going to tell you why oceans are salty, what the sources of the earth's oceans are, describe features of the ocean, and compare and contrast the different zones in the ocean.

The ocean covers up 70% of the earth which is a lot of water. There are 5 different oceans. The Pacific Ocean, Atlantic Ocean, Indian Ocean, Arctic Ocean, and the Antarctic Ocean. I bet your wondering why the Oceans are salty. The reason why they are salty is because when the clouds pick up water from rivers and lakes it is also picking up small amounts of mineral salts. When the cloud is full it lets out rain into the oceans to make it salty. Have you ever gone swimming in the ocean and got the water in your mouth? I guess not

There are a few sections of the ocean that I am going to tell you about. The Continental Shelf, the Continental Slope, and the Abyssal plain. The Continental Shelf is the edge of a continent that extends out under water and can extend out to about 500km. A lot of people think that the Continental Shelf is the deepest part of the ocean but its not.  The Continental Slope is the end of the continent.  The Abyssal plain is made up of sediments deposited at the bottom of the ocean floor. Not many fish live down there.  

Lastly, I'm going to tell you about the different zones of the ocean.  The Sunlight Zone is where the most sunlight is visible.  Heat from this light is responsible for the different water temperatures found in this zone.   Underneath that zone is The Twilight Zone. It is the zone were we begin to see strange and bizarre creatures that look like they have lights around their body. The next zone is the Midnight zone.  It extends to 1000 meters down to 4000 meters.  The only light in this zone is made by the creatures that live in this zone.  The creatures that live in this zone colors are black and red due to the lack of light.   The last zone is The Abyss. The water temp in the Abyss is near freezing and their is no light.  Not many creatures can be found in this zone.

http://www.seasky.org/deep-sea/ocean-layers.html

http://www.enchantedlearning.com/subjects/ocean

http://theworldsoceans.com/