13
AssignmentMultiple Choice

Lab: Physical and Chemical Changes

Question 13 • *26-27 CFISD TX-Chemistry A CR

Which answer below correctly identifies the changes you observed and the explanation when a candle burns?

Answer
A
physical change because the wax melted and changed shape
B
chemical change because light and heat were formed as the wick and the wax burned
C
both physical change because the wax melted and changed shape and chemical change because light and heat were formed as the candle burned
D
neither a physical change nor a chemical change because the wax only melted and light was produced from the match

Explanation

When a candle burns, the wax near the flame melts, which is a physical change because it changes state and shape. The wax vapor and wick also burn, producing new substances and releasing light and heat, so that is a chemical change. Therefore, both types of change occur, as described in choice C.

AI-written and checked against the verified answer.

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