Advanced Science Primary 6 Energy

Ravi placed a water plant in a beaker of water and provided it with constant light. He noticed bubbles forming. What would happen to the number of bubbles if he moved the light source further away?

A The number of bubbles would remain the same.
B The number of bubbles would increase.
C The bubbles would stop forming immediately.
D The number of bubbles would decrease.
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Worked Solution

Step 1: Bubbles indicate the production of oxygen during photosynthesis. Step [2-9]: Moving the light source further away reduces the light intensity. Step [2-9]: Lower light intensity reduces the rate of photosynthesis, leading to fewer bubbles.

Correct answer: The number of bubbles would decrease.

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