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A nail is typically made of metal, is hard and rigid, has a pointed end for driving into materials, and is commonly used for fastening objects together. A spoon is typically made of metal or plastic, has a curved bowl shape for scooping food or liquid, a handle for gripping, and is commonly used for eating.
A silver spoon has physical properties such as being shiny, metallic, malleable, and a good conductor of heat and electricity.
The chemical change of pizza, paper, and an iron nail would lead to a new substance(s) being formed with different properties than the original materials. A physical change, on the other hand, involves a change in the physical state or appearance of a substance without forming a new substance.
Size-dependent properties of an iron nail include the length and diameter of the nail. Size-independent properties of an iron nail include its density and magnetic properties.
Rusting of a nail is a chemical change. It involves a reaction between iron in the nail and oxygen in the air to form iron oxide (rust), which has different chemical properties compared to the original iron.
physical