Multiple choice

A different chemical substance is formed when

  1. A cloth is cut

  2. A glass breaks

  3. A piece of chalk falls down

  4. A candle burns
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Burning a candle is a chemical change because wax reacts with oxygen to form new substances (carbon dioxide and water vapor). The other options involve physical changes - cutting cloth changes only shape, breaking glass changes only form, and chalk falling changes only position. In a chemical change, new substances with different properties are formed.

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