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Burning an candle && souring milk is an example of chemical change.
An chemical change is when a substance combines with another to form a new substance.
when two or more molecules interact and the molecules change. Bonds between atoms are broken and created to form new molecules.
Examples of Physical changes: 1. Ice melting involves a change from a solid to a liquid and the substances maintain the properties of water because the molecules never change. ... Water boiling is a physical change as water molecules vibrate faster, they enter the gas phase and become water vapor.
Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.
Physical changes occur when objects or substances undergo a change that doesnot change their chemical composition.
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