Chemical and physical changes
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How are chemical changes and physical are 
Chemical and physical changes differ in whether new substances are formed. Chemical changes, like burning wood, involve the creation of new substances with different properties. Physical changes, like boiling water, only alter the form or state of a substance without creating new ones.
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What is a chemical changes and a physical changes
A physical change alters the appearance of a substance (like its size, shape, or state) but doesn't change its chemical composition. A chemical change results in the formation of new substances with different chemical properties, often involving a chemical reaction
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What is physical changes
A physical change is a transformation that alters the appearance or state of a substance, but does not change its chemical composition. This means the substance is still the same, even if it looks different. Examples include changes in size, shape, state of matter (like melting or freezing), or mixing different substance.
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What is a chemical changes
In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change