{"id":5589,"date":"2020-01-13T22:43:16","date_gmt":"2020-01-13T22:43:16","guid":{"rendered":"https:\/\/course.oeru.org\/eths101\/?page_id=5589"},"modified":"2020-01-13T22:43:16","modified_gmt":"2020-01-13T22:43:16","slug":"hydrosphere","status":"publish","type":"page","link":"https:\/\/course.oeru.org\/eths101\/learning-pathways\/earth-systems\/hydrosphere\/","title":{"rendered":"Hydrosphere"},"content":{"rendered":"
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From the darkness of space our planet is blue. This is because it has a hydrosphere and atmosphere. These outer shells surround the geosphere. In this learning pathway, we will find out about these important Earth systems.
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In the infographic, on the water cycle (below), you can see the main elements of the water cycle, which involves the geosphere, the hydrosphere, and the atmosphere. Although H2O is mainly liquid, it can also be a gas in the atmosphere or a solid (ice) in the atmosphere, mountain tops, or ice caps.\n<\/p>\n

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The water cycle<\/span><\/h2>\n

The infographic indicating where is Earth’s water<\/b> tells us where the water is stored on Earth and in what form. Note that most of the water is in the liquid state in the world’s oceans and seas and is salty. Freshwater is only 3% of all the Earth’s water, and most of that is in the form of ice.\n<\/p>\n

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Earths water distribution<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Quick quiz<\/h2>\n\t\t<\/div>\n\t<\/div>\n\t
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Review the following table summarising the earth’s water reservoir and answer the question which follows.\n<\/p>\n\n\n\n\n\n\n\n<\/tr>\n\n\n\n\n\n\n
Reservoir<\/th>\n Residence Time (average)<\/th>\n<\/tr>\n
Ocean<\/td>\n3,000 to 3,230 years<\/td>\n<\/tr>\n
Glaciers<\/td>\n20 to 100 years<\/td>\n<\/tr>\n
Seansonal Snow Cover<\/td>\n2 to 6 Months<\/td>\n<\/tr>\n
Soil Moisture<\/td>\n1 to 2 months<\/td>\n<\/tr>\n
Groundwater: Shallow<\/td>\n100 to 200 years<\/td>\n<\/tr>\n
Groundwater:Deep <\/td>\n10,000 years<\/td>\n<\/tr>\n
Lakes<\/td>\n50 to 100 years<\/td>\n<\/tr>\n
Rivers<\/td>\n2 to 6 Months<\/td>\n<\/tr>\n
Atmosphere<\/td>\n6 days<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n