Shashanth's answer to Tricia Tan 's Primary 4 Science question.

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Shashanth
Shashanth's answer
13 answers (A Helpful Person)
(a) Since there is no opening, the air did not escape hence occupied some space inside Flask A, allowing only some of the water to flow inside Flask A.

(b) Since there is an opening, the air escaped through the opening allowing all the water to flow inside Flask B.
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Hope it helped you! Tricia!