Advanced Science Primary 4 Cycles

A beaker was filled to the brim with water. When an iron ball was dropped in, 20 ml of water overflowed. What can be concluded?

A The mass of the iron ball is 20g.
B The iron ball weighs less than the water.
C The volume of the iron ball is 20 ml.
D The iron ball is 20 cm wide.
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Worked Solution

Step 1: An object dropped in water occupies space (volume). Step 2: If the beaker is full, the volume of water pushed out (overflow) equals the volume of the object. Step 3: Therefore, the volume of the ball is 20 ml.

Correct answer: The volume of the iron ball is 20 ml.

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