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Published bySophie Welch Modified over 9 years ago
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OCEANS THE OCEAN
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Oceans cover nearly 71% of the Earth’s surface!
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There are 5 Main Oceans The Pacific Ocean is the largest ocean – by far!
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Oceans are made up of salt water The amount of salt in water is called SALINITY
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Salinity of oceans varies depending on climate. Why? Warm dry regions = high salinity Heavy evaporation occurs, leaving more salt behind. Cold regions = low salinity Less evaporation occurs and melting ice and snow add fresh water
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Water Pressure The weight of water pressing on an object. The deeper you go in the ocean, the greater the pressure!
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If you can correctly name all the continents and oceans and place their location on the map, you get to read the next slide….. The ocean cartoon of the week!
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The Ocean Floor
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Continental Shelf Shallow, flat area at edge of the continent. Extends out average of 50 miles Can be 460 feet deep Continental Slope A steep hill that drops sharply in depth Found just beyond the Continental Shelf 10,000 – 13,000 feet deep
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Continental Rise Between slope and abyssal plain Build up of sediments Abyssal Plain Broad, flattest part of ocean Like a plain 16000 feet deep
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Ridge – Underwater mountain range Mid-Atlantic Ridge 37,280 miles long rift/valley that runs through Atlantic, Pacific, and Indian Oceans Trench (rift) – Deepest part of ocean Mariana Trench Philippines – 36,198 feet deep! Mount Everest would fit inside of it!
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