The hydrosphere

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The hydrosphere: rivers, tides, ocean currents and waves.

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The hydrosphere

  1. 1. *The hydrosphere is thesphere of water thatsurrounds our planet. InLatin, “hydro” meanswater.
  2. 2. Hydrosphere Oceanic Contintental waters waters UndergroundOceans Seas Rivers Lakes Icebergs water
  3. 3. Rivers: they have animportant job. They drainthe landscape, and movewater, and mineralstowards the Earth’soceans.
  4. 4. Seas and oceans: they move because of three phenomena: waves, currents and tides.
  5. 5. The surface of theEarth’s oceans are isin constant motion,moving up and down,in the form of waves.
  6. 6. There are a number ofocean currents aroundthe Earth. A current is These currents are caused bylike a vast river within differences in temperature,the ocean, flowing from differences in salinity, and byone place to another. wind.
  7. 7. But the most important factormoving water across the oceanare tides. Tides are caused bythe Sun and the gravity of theMoon. Tides cause water levelsto rise and fall every six hoursapproximately.

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