Standard Science Primary 4 Cycles

Siti inverted a plastic cup with a piece of dry tissue taped to the bottom into a basin of water. She observed that the tissue remained dry. Why?

A The tissue is made of a material that does not absorb water.
B Water cannot flow upwards into the cup.
C Air in the cup occupies space and prevents water from entering.
D The cup is waterproof.
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Worked Solution

Step 1: Identify that the cup is not empty; it contains air. Step 2: Air is matter and occupies space. Step 3: When inverted vertically, the air is trapped and prevents water from reaching the tissue. Step 4: Therefore, the tissue stays dry.

Correct answer: Air in the cup occupies space and prevents water from entering.

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