3.3.2.1 Water as a concept
(1) Basic part of the environment;
(2) Chemical matter;
(3) Necessary for life;
(4) Part of the society;
(5) World’s Day of Water (22nd of March);
(6) The year 2003—the Year of Water.
Basic concepts—hydrosphere, hydrology, areas with a lot of water and deserts.
3.3.2.2 Water resources all over the world
(1) Sea and ocean 70.7% of the Earth’s surface (361 mil.km2), but only 0.1 % and 0.24 % of the mass of the
Earth;
(2) The world’s ocean represents 97% of the Earth’s hydrosphere;
(3) The average water depth of the ocean is about 3790m. If the water of the ocean burgeon out the whole
Earth, the water will have a tickness of 2440m;
(4) Water cycle (small, great, the hight of the atmosphere of 7km contains about 12400km3, flowrate and its
3.3.2.1 Water as a concept
(1) Basic part of the environment;
(2) Chemical matter;
(3) Necessary for life;
(4) Part of the society;
(5) World’s Day of Water (22nd of March);
(6) The year 2003—the Year of Water.
Basic concepts—hydrosphere, hydrology, areas with a lot of water and deserts.
3.3.2.2 Water resources all over the world
(1) Sea and ocean 70.7% of the Earth’s surface (361 mil.km2), but only 0.1 % and 0.24 % of the mass of the
Earth;
(2) The world’s ocean represents 97% of the Earth’s hydrosphere;
(3) The average water depth of the ocean is about 3790m. If the water of the ocean burgeon out the whole
Earth, the water will have a tickness of 2440m;
(4) Water cycle (small, great, the hight of the atmosphere of 7km contains about 12400km3, flowrate and its
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