When using a metal key to scratch different materials, some like wood and chalk may scratch easily due to being softer, while others like iron or stone may be much harder to scratch due to their greater hardness.
What would happen if you used a metal key to scratch different materials like wood, stone, or iron?
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If you used a metal key to scratch materials like wood, stone, or iron, softer materials like wood might scratch easily, while harder materials like stone or iron would be more resistant. The key’s hardness relative to the material determines the ease of scratching.