Standard Science Primary 3 Diversity

Ravi noticed that fish in his aquarium were swimming near the surface and gasping for air. Which of the following is the most likely reason?

A There was not enough dissolved air in the water.
B The fish wanted to see the light.
C The fish were hungry.
D The water was too cold.
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Worked Solution

Step 1: Living things need air to stay alive. Step 2: Fish take in air dissolved in water through their gills. Step 3: If air levels are low, they go to the surface where oxygen levels are higher.

Correct answer: There was not enough dissolved air in the water.

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