Question

A boy adds hot water in an aquarium to make the water warm. What could have happened to the fish in the aquarium, after a while?

• A. Fish will reproduce easily.
• B. All the fish will die.
• C. Warmer water will make the fish more comfortable.
• D. Warm water will help in the quick movement of the fish in the aquarium.

Answer 1

The correct option is B

All the fish will die.

Aquatic animals use dissolved oxygen to breathe in water. As the temperature of water increases, the amount of dissolved oxygen decreases.

When hot water is added in the aquarium, the amount of dissolved oxygen in water decreases. Due to the decreased oxygen content in the water, the fish will find it difficult to breathe and will eventually die.