Oceans
Picture of ocean floor
The ocean Floor
The edges of the continents slope away gently from the shore. The part of a continent that is under the water is called the continental shelf. Continental shelf surrounds almost all of Earth's land! Where the continental shelf ends, a continental slope begins. The bottom of the ocean drops sharply here. Rivers empty into the ocean, they carry tiny bits of rock called sediments. The sediments gather at the base of the continental slope. The sediments gather to form the large gently sloping continental rise. Beyond it has hills, mountains, deep valleys, and even flat areas. There are many more features to the Ocean's Floor. But don't take my word for it, see the picture!
Salinity, Water Pressure, and Density
The Five Oceans
Salinity is the measure of how salty the water is.
Water pressure is the force caused by the weight of water pushing down on the ocean floor. The lower you go the higher the pressure is.
Density is the amount of matter in a given volume of something. For Example if water has a lot of salt in it, it will be more dense then water with no salt at all.
The 5 main oceans are the Pacific, the Atlantic, the Indian, the Arctic, and the Southern. The Pacific Ocean is the largest Ocean taking up 46% of Earth's water. The Arctic Ocean is the smallest taking up 4% of Earth's water.
Introduction
Thanks For Watching!
If you look at the Earth from space you will see that most of the Earth is blue. This is because most of the world is covered with water, 75% to be exact. That means that only 25% of the world is covered with land. Salt water covers about 71% of the earth's surface, which means the 4% left is fresh water.
Hope you were paying attention! Get ready for a Kahoot!
Waves, Currents, and tides
A wave is a rhythmic movement that carries energy through matter space. The highest point of a wave is called the crest. Just like you hear in books! For Example: The Wave Crested the beach. The lowest point of a wave is called the trough. Currents are like rivers of water that move through the ocean. Some currents are at the surface while others flow deep in the ocean. Currents can have different speeds, temperatures, and densities. The force and direction of winds and the Earth spinning causes Surface currents. The deep-water currents are caused by the different densities of the water. The tides are caused by the gravitational pull between Earth and the moon. There are low tides and high tides.