WorksheetsChanges around us
Total questions: 55
Worksheet time: 42mins
Which of the following is an irreversible change?
Combing hair
Crushing a can
Burning paper
Dissolving salt in water
Which of the following is reversible change?
Bending a wire
Making tea
Rusting of iron
Sprouting a seed
Which of the following is a chemical change?
Harvesting cotton fibres
powdering jeera seeds
Making cheese from milk.
Cutting an apple
Which of the following is an application of expansion due to heat.
Rotating of a fan
Rusting of iron
Working of a television
Working of a mercury thermometer
Which of the following contracts the least.
Solida
Liquids
Gases
All contract equally.
From which of the following containers do you think maximum evaporation will take place?
What is a change?
A change refers to a difference in shape, size, colour or any other property of a object.
A change occurs everyday and everywhere around us.
All of the above.
What are the 4 types of Changes?
Physical, Chemical.
Physical, Chemical, Reversible.
Physical, Chemical, Irreversible, Reversible.
What do you think Reversible change is?
It is a Temporary change
It is a Lasting change.
What do you think Irreversible change is?
Non - permanent change.
Permanent change
Brain Teaser-
Which type of change is Tsunami?
Irreversible change.
Physical change.
Undesirable change.
Desirable change.
All of the above.
Which type of change is Growing of plant?
Irreversible change.
Physical change.
Chemical change.
Activity -
Choose the following image which shows Physical change.
Activity -
Choose the image which shows Chemical change.
Activity -
Choose the image which shows Reversible change.
Pick change that can be reversed from the following
Cutting of treee
Melting of ghee
burning of candle
blooming of flower
Which of the following cannot be reversed
Hardening of cement
Freezing of ice cream
Opening of door
Melting of chocolate
An iron is heated. Which of the following statement about is incorrect
The ring expand
The ring almost comes to the same size on cooling
The change in this case is reversed
The ring change its shape and the change cannot be reversed
While lighting the candle, paheli observed the following changes.
Wax was melting
Candle was burning
Size of candle was reducing
Melted wax was getting modified
When you break a glass of water can it change back by its own shape
False
True
example of reversible changes is tearing of paper
True
False
Boiling egg is an irreversible changes
True
False
Is vapourisation an reversible changes
True
False
During condensation and evaporation of water, the ________ of water changes.
Appearance
State
Movement
The_______ balloon changes when we blow the air.
Color
Shape
All changes takes place due to some______
Cause
Choice
Rolling of chapathi and baking oh chapathi are the changes that,
Can be reversed
Cannot be reversed
Can be reversed and cannot be reversed
Cannot be reversed and can be reversed
Increase in the volume of substances on heating,the substance will show the change in,
Extension
Expansion
Exclusion
Changes that lead to the formation of new substances are called_________.
Physical change
Chemical change
Which of the following can be reversed?
Raw egg to boiled egg
Wet clothes to dry clothes
Bud of a flower
Cow dung to bio-gas
The burning of wood
Can be reversed
Cannot be reversed
Can be expanded
Can be melted
Pick the change that can be reversed from the following
Cutting of trees
Melting of butter
Burning of candle
Blooming of flower
What is a reversible change?
a change that cannot be reversed
a change that can be reversed
I don't know
a change where a new substance is formed
The picture shows an example of a ______________ change.
reversible
freezing
irreversible
all of the above
Folding of paper is a ____________ change while burning it is a _____________ change.
reversible , reversible
reversible, irreversible
irreversible, reversible
Which one of the following is a beneficial change?
rusting of iron object
spoilage of food
ripening of fruit
souring of milk
Classify the following as reversible or irreversible changes:
(i) Growth of a plant
(ii) Ploughing a field,
(ii) Melting of wax
(iv) Falling of rain
(v) Pulling of rubber string
(vi) Breaking of a glass rod
(mi) Cooking of food.
Reversible : (ii), (iii), (v)
Irreversible changes : (i), (iv), (vi), (ii)
Reversible : (iii), (ii), (iv)
Irreversible changes : (i), (v), (vi), (vii).
BURNING OF WOOD IS WHAT CHANGE
PHYSICAL CHANGE
CHEMICAL CHANGE
MELTING OF ICE IS WHAT CHANGE
PHYSICAL CHANGE
CHEMICAL CHANGE
CHEMICAL CHANGE IS REVERSIBLE
TRUE
FALSE
CHEMICAL CHANGE IS (click on all correct options)
PERMANENT
IRREVERSIBLE
TEMPORARY
REVERSABLE
Give an example of physical change
kicking a football
burning a paper
growth of animals and plants
cooking
When object is cooled, it's size
Increases
Decreases
Remains same
None of the above
In general, on heating metals
Contract
Expand
Can expand or contract
None of these
