Give the main differences between physical changes and chemical changes.
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| PHYSICAL CHANGE | CHEMICAL CHANGE | ||
| $i$ | No, new substance is formed in a physical change. | $i$ | New substance is formed in a chemical change. |
| $ii$ | It is a temporart change. | $ii$ | A chemical change is a permanent change. |
| $iii$ | It is easily reversible. | $iii$ | This process is usually irreversible. |
| $iv$ | Very little heat or light energy is usually absorbed or given out in this process. | $iv$ | A lot of heat or light energy is absorbed or given out in this process. |
| $v$ | Mass of substance does not alter. | $v$ | Mass of substance does alter in this process. |
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