Question

Categorize the following changes as Physical or Chemical changes.

a) Paper towel absorbs water and gets wet

b) A solid is crushed to a powder.

c) A bicycle changes colour as it rusts.

d) Two substances are mixed and light is produced.​

Answer 1

Hi!

a) Paper towel absorbs water and gets wet - Physical change

b) A solid is crushed to a powder - Physical change

c) A bicycle changes colour as it rusts. - Chemical change

d) Two substances are mixed and light is produced - Chemical change

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Hope it helps you :D

Answer 2

Changes are characterized below -

a) Paper towel absorbs water and gets wet - Physical change

b) A solid is crushed to a powder - Physical change

c) A bicycle changes colour as it rusts - Chemical change

d) Two substances are mixed and light is produced - Chemical change

• Physical changes do not involve changes in the composition of objects. Moreover, they can be sensed by the sense organs.
• Physical changes are not accompanied by the formation of any new substance and are associated with changes in the physical properties of objects.
• Chemical changes involve the formation of new substances by breaking and formation of bonds.