Question : Sea water is salter than rainwater because
Option 1: sea animals are salt-producing
Option 2: the air around the sea is salty
Option 3: rivers wash away the salts from the Earth and pour them into the sea
Option 4: sea beds have salt-producing mines
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Correct Answer: rivers wash away the salts from the Earth and pour them into the sea
Solution : The correct option is rivers wash away the salts from the Earth and pour them into the sea.
Rainwater is relatively clean, with few dissolved minerals. Rainwater, on the other hand, gathers up minerals and salts from the soil and rocks as it runs over land and into rivers. These minerals and salts are subsequently conveyed by rivers and deposited in oceans and seas. The process, known as weathering and erosion, leads to salt buildup in the seas. The sun's heat causes the water in oceans and seas to evaporate, leaving the salts behind.
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