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Ocean Composition

Facts about Earth's oceans

What are the five oceans in the world? The five main oceans in the world are the Pacific, the Atlantic, the Indian, the Southern, and the Arctic.
How did salt get into Earth's oceans? Salt got into Earth's oceans when rain washed over rocks that contained salt-making substances in minerals. The substances were carried to deep basins. That is how salt got into Earth's oceans.
What is brackish water? Brackish water is fresh water mixed with salt water. It is found in estuaries.
What are the parts that make up the seafloor? The parts that make up the seafloor are continental margins, abyssal plains, mid-ocean ridges, and ocean trenches.
What is the surface zone of the ocean? The surface zone of the ocean is The area of shallow seawater that receives the most sunlight and most organisms live here.
Why do very few animals live in the deep zone of the ocean? Few animals live in the deep zone because it receives no sunlight. The only light is the bioluminescence (light) produced by deep sea animals.
What happens to the temperature of water as depth increases in tropical regions? In tropical regions, as depth increases, water temperature decreases (no sunlight).
What happens to water density as depth increases in temperate regions? In temperate regions, as depth increases, water density increases.
Created by: shwetanknsingh