Use nearby land as a clue. The Pacific appears west of the Americas and east of Asia on this map; its two edges meet on a globe. Five ocean names describe connected regions, not five isolated pools. Continents are land; oceans and seas are water.
Worked example
Africa is a continent, not an ocean. The water east of Africa, below Asia and west of Australia is the Indian Ocean. A name beside a shape is a label, not a drawn boundary.
Build a map explanation
Name all five oceans, then describe one using two nearby continents. Explain to a helper why counting printed labels could give the wrong ocean count. Optional: use the blank map linked from the lesson to write the names yourself. A helper reviews that writing separately; checked choices do not grade your handwritten map.