Question

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?
bending a piece of aluminum
breaking a matchstick
dissolving sugar in water
burning a candle

Answer 1

Answer:

Burning of Candle

because when candle burns, the wax melts and solidifies again....... this is the physical change........ some wax also evaporates..... this is the chemical change

Answer 2

Burning a candle my buddy because the cotton wick is burning which is chemical change and the wax is melting which is physical change