Jack was getting late for the school, so, his mother advised him to pour hot milk from a glass into a saucer and then drink. Why did she say so? Give reason.

Explanation

### Step-by-Step Solution:

1. **Understanding the Context**: Jack's mother advised him to pour hot milk from a glass into a saucer. This action is intended to help Jack drink the milk more quickly.

2. **Reason for the Advice**: The primary reason for this advice is related to the process of **evaporation**. When hot milk is poured into a saucer, it spreads out over a larger surface area compared to when it is in a glass.

3. **Effect of Surface Area on Evaporation**: The larger surface area allows more molecules of the liquid to escape into the air as vapor. This means that the milk will cool down faster when it is spread out in the saucer.

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