Coast

The learning activity has three parts:

Earth, water planet
{What share of Earth surface is covered by the sea? - Half. + Aproximately 70%. - Less than one tenth.
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Lithosphere, hydrosphere and atmosphere
{Left to right, how are they ordered? - Below the sea, above the stone, and at the top of the air. - The lithosphere surounding outside the hydrosphere, and both bellow the atmosphere. + Water, that is more heavy, below the air, and the ground below both.
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