How can the oceans be described? By: Jordan and Hanna

The Hydrosphere Earth is sometimes called the blue planet. Most of earths water is in salty oceans. All the waters of Earth make up the hydrosphere Sea level: The level of the oceans surface Sea level differs from the ocean to ocean

Earth’s Oceans Ocean water contains many kinds of salt. Oceans get salt from rivers. Salinity: is a measure of the amount of salt in water. Cold, salty water is heavier than the same amount of water that is either warm or has lower salinity.

Ocean temperatures The temperature of the ocean water differs from place to place. Ocean water near the equator is about 30 degrees Celsius.(warmer) Near the poles, ocean water can be as cold as -2 degrees Celsius.(colder) Some currents carry warm water to the poles.

Ocean Resources Much of the salt that people add to food comes from the ocean. Tuna is just one of many foods that come from the ocean. Materials such as Magnesium and drinking water also come from the ocean.