Why are droplets of water observed on the outer walls of a glass tumbler containing ice?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Situation**: We have a glass tumbler filled with ice. The outer walls of the tumbler are observed to have tiny droplets of water on them.

2. **Heat Transfer**: The ice inside the tumbler is at a lower temperature than the surrounding air. As the ice melts, it absorbs heat from the surrounding air.

3. **Temperature Decrease**: When the ice absorbs heat, it causes the temperature of the air around the tumbler to decrease. This is because the heat energy is being taken away from the air to melt the ice.

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