Compare the changes taking place in an iron piece and a wood log on heating with a hammer.

Explanation

### Step-by-Step Solution:

1. **Identify the Materials**: We have two materials to compare: an iron piece (a metal) and a wood log (a non-metal).

2. **Effect of Hammering on Iron**: When we hammer the iron piece, it undergoes a change where it can be flattened and shaped into thin sheets. This property of metals to be deformed under stress without breaking is known as **malleability**.

3. **Effect of Hammering on Wood**: In contrast, when we hammer the wood log, it does not deform like the iron. Instead, the wood tends to break into smaller pieces. This characteristic of wood indicates that it is **brittle**.

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