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WorksheetsChanges around us Class - 6
Total questions: 16
Worksheet time: 12mins
What are reversible and irreversible changes?
(Write like this :
Reversible changes:
Irreversible changes: )
(a)
Can you obtain wood from sawdust?
No
Yes
I don't know
None of these
Can we say that ironing of a cloth is a reversible change?
Yes
No
Both, yes & no.
I don't know
Can deforestation be considered as a reversible change?
No
Yes
Give two examples each of reversible and irreversible changes.
State whether burning of a piece of paper is a reversible or an irreversible change.
Its a irreversible change.
Its a reversible change.
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), (vii).
Reversible : (iii), (ii), (iv)
Irreversible changes : (i), (v), (vi), (vii).
A small quantity of curd is added to warm milk. The milk is stirred and is set aside undisturbed for a few hours at a warm place. In a few hours, the milk changes into curd. Is this change reversible?
No, its Irreversible.
Yes, its reversible.
I don't know
The question is inappropriate.
List 1 easiest way to bring a change.
(a)
Which of the following changes can be reversed?
Raw egg to boiled egg
Wet clothes to dry clothes
Bud to flower
Cow dung to biogas
Which of the following changes cannot be reversed?
Milk to paneer
Cold milk to hot milk
Yam to knitted sweater
Wet clothes to dry clothes
Metal rim is fixed to the wooden cart wheel by
heating metal rim
heating wooden wheel
cooling metal rim
cooling wooden wheel
On heating metal rim
expands
contracts
depends how much it is heated
depends as the type of meted
Which one of the steps while burning a candle is not reversible?
Melting of solid wax
liquid wax changes into vapours
Wax vapour bums into flame
All of these
Which is a way to make a change happen?
Heating a substance
Cooling a substance
Mixing a substance with another substance
All of these
Which of the following is not a man-made change?
Change of day and night
Burning of fuels
Drying of clothes
Tearing of paper
