Ocean and sea
The terms "the ocean" or "the sea" used without specification refer to the interconnected body of salt water covering the majority of the Earth's surface. It includes the 查看更多內容

Volumes
The volume of water in all the oceans together is approximately 1.335 billion cubic kilometers (1.335 sextillion liters, 320.3 million cubic miles).
Depth
The average … 查看更多內容

Life within the ocean evolved 3 billion years prior to life on land. Both the depth and the distance from shore strongly influence the biodiversity of the plants and animals present in each region. The diversity of life in the ocean is immense, including:
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During planetary formation Earth possibly had magma oceans. Subsequently outgassing, volcanic activity and meteorite impacts, according to current theories, produced an … 查看更多內容

The entire ocean, containing 97% of Earth's water, spans 70.8% of Earth's surface, making it Earth's global ocean or world ocean. This makes Earth, along with its vibrant hydrosphere a "water world" or "ocean world", particularly in Earth's early history when the … 查看更多內容

Salinity
Salinity is a measure of the total amounts of dissolved salts in seawater. It was originally measured via measurement of the amount of chloride in seawater and hence termed chlorinity. It is now routinely measured by … 查看更多內容

The ocean has been linked to human activity throughout history. These activities serve a wide variety of purposes, including navigation and exploration, naval warfare, travel, shipping and trade, food production (e.g. fishing, whaling, seaweed farming, aquaculture), … 查看更多內容