State whether the following are physical or chemical changes
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heating of water — physical change,
growing of a piglet into a pig — chemical change,
burning of wood — chemical change,
passing electric current through a heater rod — physical change.
water cycle in nature — physical change,
respiration in living beings — chemical change,
shaping a piece of glass — physical change,
lightning — chemical change,
(energy produced) dissolving sugar in water — physical change,
heating a mixture of iron filings and sulphur—chemical change.
mixing oil with water — physical change.
cutting wood into small pieces — physical change,
photosynthesis — chemical change.
Digestion of food — chemical change.
Melting of wax — physical change.
Boiling of an egg — chemical change.
Slaking of lime — chemical change.
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c. physical change
d. chemical change
e. chemical change
f. physical change
g. physical change
h. chemical change
i. physical change
j. chemical change
k. chemical change
l. chemical change
m. physical change
n. physical change
o. chemical change
p. chemical change
q. physical change
r. chemical change
s. chemical change
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