Physical or chemical change?
a. lighting of a candle
b. freezing an ice cream
c. souring of milk
d. decomposition of limestone by heat
e. dissolving sugar in water
f. digestion of food
g. formation of bubbles in boiling water
h. tarnishing of silver
i. heating of glass
j. sawing of wood
Answer:
physical
physical
physical
chemical
physical
physical
physical
physical
physical
physical
physical
b e g i j
chemical
a c d f h
chemical
physical
chemical
chemical
physical
che mical
physical
chemical
physical
physical
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