Classify each of the following as a physical change or a chemical change. a) grinding glass: b) rusting of iron: c) burning a candle: d) sanding wood:

Physical change: (a) grinding of glass, (c) burning of candle, (d) sanding wood

Chemical change: (b) rusting of iron.

Explanation:

Physical Change: This is the type of change a matter undergoes, it is easily reversible and no new substance is formed.

Chemical Change: Is one which is not easily reversible and a new substance is formed.

From the question above, the following changes can be classified into physical or chemical change

Physical change: (a) grinding of glass, (c) burning of candle, (d) sanding wood

Chemical change: (b) rusting of iron

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