`A physical change is one in which matter is changed into another physical state without changing its chemical constitution(eg-ice melts to water,in both case substance is H2O).A chemical change is where there is a chemical change of the substance during the process(eg-CaCO3 is heated to form CO2 and CaO,here the new substance formed is unrelated chemically to parent substance.)
A car crash is physical.
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No, sunburn is a physical change rather than a chemical change. It involves damage to the skin from overexposure to ultraviolet radiation from the sun, rather than a change in the chemical composition of the skin.
Because it can change from one state to another.
The chemical formula H2O represents water. It is a chemical formula that describes the composition of a substance, in this case, water. Therefore, it is related to a chemical change rather than a physical change.
when a rock is erodded by wind or waves is a physical change where acid rain eroding a stone figure would be chemical
a computer is a chemical change as it is a machine.
Boiling is a physical change, not chemical.
It's a chemical change. Fermentation involves the production of alcohol and carbon dioxide from sugar. Since new substances are formed, the change is chemical, rather than physical.
Elasticity is a physical property related to the ability of a material to deform and return to its original shape when a force is applied. It is not a change in the chemical composition of the material, so it is a physical property rather than a chemical change.
When milk sours, it undergoes a chemical change rather than a physical change. The bacteria in the milk ferment the lactose sugar into lactic acid, changing the chemical composition of the milk. This process cannot be reversed by physical means, distinguishing it as a chemical change.
Sawdust is not a change. Making solid wood into sawdust by sawing it, would be a physical change.