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A teacher wants to perform a classroom demonstration that illustrates both chemical and physical changes. Which would be the best demonstration that she could use?

Abending a piece of aluminum

B)breaking a matchstick

Cdissolving sugar in water
Dburning a candle

Verified Answer :

Burning a candle because the candle gets smaller and causes a chemical change

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Answer

D) burning a candle

Explanation

When burning a candle no new substance is form.

We have both physical and chemical change occuring.

Physical part: Melting of the solid wax and evaporation of the liquid forms the physical change.

Chemical part: burning of the wax vapour forms the chemical change.

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