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In one word... grease ! The natural oils in our skin are left behind when we touch surfaces.

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9y ago

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What causes fingerprints to be left behind when people touch things?

Fingerprints are left behind when people touch things due to the sweat and oils present on the ridges of their fingers. These residues get transferred onto surfaces, creating a pattern unique to each individual.


What causes fingerprints to be left behind when we touch things?

Fingerprints are left behind when we touch things due to the sweat and oil secretions from our skin. As we touch surfaces, these secretions transfer onto the object, forming a unique pattern that we know as a fingerprint.


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The white residue from water is caused by minerals, such as calcium and magnesium, that are left behind when the water evaporates. This residue is commonly known as limescale or mineral deposits.


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