1 / 8

Earth’s Oceans

Earth’s Oceans . World’s Oceans. 70-71% of Earth’s crust covered by ocean water 4 Major Oceans Pacific – largest and deepest Atlantic- little larger than the Indian Indian – same depth as Atlantic, but smaller Arctic – smallest and shallowest. Water Cycle.

saniya
Download Presentation

Earth’s Oceans

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Earth’s Oceans

  2. World’s Oceans • 70-71% of Earth’s crust covered by ocean water • 4 Major Oceans • Pacific – largest and deepest • Atlantic- little larger than the Indian • Indian – same depth as Atlantic, but smaller • Arctic – smallest and shallowest

  3. Water Cycle How is the ocean the largest source of fresh water?

  4. Properties of Ocean Water • Ocean water: a mixture of dissolved gases and solids in pure water • Contains 85 of 90 naturally existing elements • 96.5% pure water; 3.5% dissolved minerals

  5. Properties of Ocean Water • Salinity – amount of dissolved salts in ocean water • expressed in ppt (parts per thousand) • # of grams of salts dissolved in 1 kg of ocean water

  6. Properties of Ocean Water • Sources of minerals - (NaCl the most common) • Volcanic activity • Erosion from land (upstream) • Waves breaking on the land

  7. Salinityis usually the same; differences result from • Precipitation, runoff, and melting sea ice and icebergs - result in lower salinity • Formation of sea-ice and evaporation – result in higher salinity

  8. Most abundant gases in ocean water • N, CO2, and O • Amount varies with depth – cold water holds more gases • Oxygen/ CO2 cycle between plants and animals same as on land

More Related