1. The size of the air bubbles rising from the bottom of an aquarium i

1.	1. The size of the air bubbles rising from the bottom of an aquarium increases. Can you explain the reason?2. What do you observe?3. What is the reason for the rising of the ink upwards?4. What did you observe on cooling the bottle after taking it out? Why?5. What can you infer about the relation between the volume and temperature of a gas?
Answer» 1. As the bubbles move upward, the pressure on them decreases. This causes increase in volume. So as the bubbles move upward, their size increases. 2. Ink rises through the tube 3. When the bottle is placed in hot water, air inside the bottle becomes hot. This causes expansion of air. This pushes ink in the tube. So ink rises through the tube. 4. Ink comes down. Because as air becomes cool, Its volume decreases. 5. When temperature is increased volume of gas increases. Similarly, when temperature is decreased, The volume decreases.

1. The size of the air bubbles rising from the bottom of an aquarium increases. Can you explain the reason?2. What do you observe?3. What is the reason for the rising of the ink upwards?4. What did you observe on cooling the bottle after taking it out? Why?5. What can you infer about the relation between the volume and temperature of a gas?

Answer»

1. As the bubbles move upward, the pressure on them decreases. This causes increase in volume. So as the bubbles move upward, their size increases.

2. Ink rises through the tube

3. When the bottle is placed in hot water, air inside the bottle becomes hot. This causes expansion of air. This pushes ink in the tube. So ink rises through the tube.

4. Ink comes down. Because as air becomes cool, Its volume decreases.

5. When temperature is increased volume of gas increases. Similarly, when temperature is decreased, The volume decreases.

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