a) Differentiate between oceans and seas.(b) Explain three sources of salinity in the oceans .(c) State three features on the ocean floor.
Answer Text: a) - An ocean is a large/ extensive body of saline/ salty water occupying large basinsbetween continents while a sea is a large body of saline/ salty on the margins of continents.. b - Volcanic materials from the ocean floor add salts to the water- Some salt is dissolved by sea water from the underlying rocks it is in contact with- Some salt is added by rivers that have dissolved it from the land- Most of the salt is thought to have been present when water bodies were formedc) - Ocean deeps- Continental shelf/ continental slope- Ocean ridges- Deep sea plains- Islands
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