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WorksheetsCHANGES AROUND US
Total questions: 20
Worksheet time: 10mins
A physical change...
changes the physical properties of an object, but does not create a new substance.
creates a new substance and cannot be undone.
A chemical change
changes the physical properties of an object, but does not create a new substance.
creates a new substance and cannot be undone.
Is this an example of a physical or chemical change?
physical
chemical
BURNING OF WOOD IS WHAT CHANGE
PHYSICAL CHANGE
CHEMICAL CHANGE
CHEMICAL CHANGE IS REVERSIBLE
TRUE
FALSE
RUSTING OF IRON IS WHAT REACTION
(a)
In a physical change:
The molecules of the substance do not change
The molecules of the substance do not change
The molecules of a substance undergo change
New substance are formed
Which of the following changes cannot be reversed?
Milk to paneer
Cold milk to hot milk
Yarn to knitted sweater
Wet clothes to dry clothes
The process where the liquid changing into solid is called
Evaporation
Condensation
Heating
Boiling
A change which is permanent in nature....
Irreversible
Reversible
A bag of cement lying in the open gets wet due to rain during night time. The next day sun shines brightly. Do you think the changes that have occured in the cement can be reversed?
Yes
No
Give a example of physical change
kicking a football
burning a paper
growth of animals and plants
cooking
Growth of animals and plants
chemcial change
physical change
I don't know
Reversible change
Salt can be separated from its solution (salt dissolved in water), because
mixing of salt in water is a change that can be reversed by evaporation
mixing of salt in water is a change that can be reversed by heating and melting salt
mixing of salt in water is a change that cannot be reversed
mixing of salt in water is a permanent change
When iron is heated it
contracts
expands
dissolves
evaporates
The process where water changes into a vapour after heating is called
decantation
filtration
condensation
evaporation
Boiling an egg is a
chemical change
physical change
