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Changes around Us revision

Total questions: 139

Worksheet time: 2hrs 52mins

Name
Class
Date
1.

What is a change?

a)

A change refers to a difference in shape, size, colour or any other property of a object.

b)

A change occurs everyday and everywhere around us.

c)

All of the above.

2.

What are the 4 types of Changes?

a)

Physical, Chemical.

b)

Physical, Chemical, Reversible.

c)

Physical, Chemical, Irreversible, Reversible.

3.

What do you think Reversible change is?

a)

It is a Temporary change

b)

It is a Lasting change.

4.

What do you think Irreversible change is?

a)

Non - permanent change.

b)

Permanent change

5.

Can you mention few examples on Irreversible change?

4 lines
6.

Can you mention few examples on Reversible change?

4 lines
7.

Who discovered the changes?

a)

Katrina Kaff

b)

Antoine Lavoisier

c)

Katliya John

d)

None of these

8.

Brain Teaser-

Which type of change is Tsunami?

a)

Irreversible change.

b)

Physical change.

c)

Undesirable change.

d)

Desirable change.

e)

All of the above.

9.

Which type of change is Growing of plant?

a)

Irreversible change.

b)

Physical change.

c)

Chemical change.

10.

What is Contraction?

(Please read and understand the picture given at the top, for explanation).

4 lines
11.

What is Expansion?

(Please read and understand the picture given at the top, for explanation).

4 lines
12.

Activity -

Choose the following image which shows Physical change.

a)
b)
c)
13.

Activity -

Choose the image which shows Chemical change.

a)
b)
c)
14.

TRUE/FALSE :

Are all physical changes reversible?

a)

True

b)

False

15.

Activity -

Choose the image which shows Reversible change.

a)
b)
c)
16.

If the removal of the cause of change leads to regain the original situation, then the change is known as (a)   .

17.

The changes which are controlled by man are called ………….. .

(a)  

18.

Thinking Skills :

Which of the following changes cannot be reversed?

a)

Milk to paneer.

b)

Cold milk to hot milk.

c)

Yam to knitted sweater.

d)

Wet clothes to dry clothes.

19.

If you liked our quiz, we would like to hear a feedback from you!!

4 lines
20.
Which of these is NOT a reversible change?
a)
Water to Ice
b)
Juice to Popsicle
c)
Cookie Dough to Cookie
d)
Melting Chocolate
21.
Which is not a property of matter?
a)
solid
b)
liquid
c)
gas
d)
ice
22.
What is a reversible change?
a)
Something you can change back.
b)
Something you cannot change back.
23.
Define chemical change
a)
An irreversible chemical reaction involving the rearrangement of the atoms of one or more substances
b)
A reversible reaction
c)
Chemicals become seperate
d)
I don't know
24.
Which is a chemical change?
a)
Breaking glass
b)
Baking a cake
c)
Shredding paper
d)
Melting ice
25.
Is heating sugar to make caramel a physical or chemical change?
a)
Chemical
b)
Physical
26.
Changing liquid to a gas is called
a)
evaporation
b)
condensation
c)
melting
d)
freezing
27.
What is happening in the statement below?
The ice cube melted.
a)
Matter is changing from a liquid to a solid.
b)
Matter is changing from a liquid to a gas.
c)
Matter is changing from a solid to a liquid.
d)
Matter is changing from a gas to a liquid.
28.
The picture shows an example of a ______________ change.
a)
chemical
b)
physical
c)
irreversible
d)
freezing
29.
When heat is added to a solid, it ______________.
a)
freezes
b)
evaporates
c)
melts
d)
condenses
30.
Which of these is a result of a physical change?
a)
A new odor
b)
A new gas
c)
A new chemical substance
d)
A solution
31.
A change in the size, shape, or state of matter.
a)
chemical change
b)
physical change
c)
chemical reaction
d)
electron change
32.
One cup of water is left outside for two days when it was checked there was only half a cup left. What happened?
a)
evaporation; chemical change
b)
condensation; physical change 
c)
evaporation; physical change
d)
condensation; chemical change
33.
Ms. Johnson gave all of her students a box of M&M's  but one of them was allergic to red dye.  What must the student do to make sure that the candy is safe for him to eat?
a)
Make a new mixture which is a physical change.
b)
Separate the mixture which is a physical change.
c)
 Make a new substance which is a physical change.
d)
Make a new substance which cannot be reversed.
34.
A student is creating a potting soil mix. She combines 100 grams of sand, 200 grams of soil, and 200 grams of pebbles to make her potting soil. What is the mass of the potting soil?
a)
100 grams 
b)
200 grams
c)
300 grams
d)
500 grams
35.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
36.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
37.
Adding baking soda and vinegar together and it fizzes and creates carbon dioxide.
a)
Chemical
b)
Physical
38.
Which of these is NOT a reversible change?
a)
Water to Ice
b)
Juice to Popsicle
c)
Cookie Dough to Cookie
d)
Melting Chocolate
39.
Freezing juice is an example of a(n) ________
a)
physical change
b)
chemical change
40.

Identify the type of change shown here-

a)

PHYSICAL CHANGE

b)

NO CHANGE

c)

REVERSIBLE CHANGE

d)

IRREVERSIBLE CHANGE

41.

a)

PHYSICAL CHANGE

b)

IRRIVERSIBLE CHANGE

c)

NO CHANGE

d)

CHEMICAL CHANGE

42.

Is a burning candle a physical or chemical change?

a)

Physical

b)

Chemical

c)

BOTH

43.

Kajal left her hammer outside. When she found it a few months later, some parts of the metal were covered with flaky, brown rust. Which type of change occurred when rust formed on the hammer?

a)

chemical

b)

electrical

c)

thermal

d)

physical

44.

Grilling of food is a ________ type of change

a)

PHYSICAL CHANGE

b)

CHEMICAL CHANGE

c)

REVERSIBLE CHANGE

d)

NO CHANGE

45.

An irreversible change is one in which---------

a)

The original substances can be obtained

b)

The original substances can sometimes be obtained

c)

The original substance cannot be obtained

d)

No new substance is formed

46.
What happens in ALL chemical changes?
a)
Change in state of matter
b)
A new substance is formed
c)
Bubbles are produced
d)
An explosion
47.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
48.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
49.

Setting of curd from milk is __________________ change

a)

slow, chemical and irreversible

b)

fast, physical and reversible

c)

slow, physical and reversible

d)

slow, physical and reversible

50.

A teacher wants to show clear difference between physical and chemical changes, which one of the following will be suitable for the same

a)

boiling of milk and freezing it

b)

setting curd and making paneer

c)

melting ice and freezing it

51.

Folding of paper is a ____________ change while burning it is a _____________ change.

a)

physical, physical

b)

fast, physical

c)

physical, chemical

52.

Spreading of Viral infections like COVID-19, is a ______________ change

a)

fast

b)

slow

c)

physical

d)

moderate

53.

A seed grows to form a seedling and further a plant, this is a ________________ change

a)

Fast

b)

Slow

c)

Temporary

d)

Reversible

54.

When cooked food is left outside at room temperature, it gets spoilt. This is an example of __________ change.

a)

Reversible

b)

Physical only

c)

Chemical only

d)

Irreversible

55.

A child was learning origami by folding paper, this involves __________ change

a)

Chemical

b)

Irreversible

c)

Physical

d)

No change

56.

Mrs. Aggarwal accidentally mixed oil in water while working in kitchen. Which method can be used to separate oil and water.

a)

Distillation

b)

Centrifugation

c)

Evaporation

d)

Separating funnel

57.

While making salt from sea water, _________ process is used. It involves _______ change.

a)

condensation, slow

b)

distillation, fast

c)

evaporation, reversible

d)

crystallisation, irreversible

58.

In any reversible change

a)

final substance cannot be brought back to its original form

b)

final substance can be brought back to its original form

c)

new substance is formed

59.

Pick the reversible change

a)

Crushing paper

b)

Tearing a piece of cloth

c)

burning paper

60.

Pick the irreversible change

a)

Bursting balloons

b)

Melting ice

c)

Folding clothes

61.

Which one is true about physical changes?

a)

new substance is formed

b)

there is change in chemical composition

c)

no new substance is formed

62.

Pick the physical change

a)

burning paper

b)

bursting balloons

c)

frying potatoes

63.

Which of the following is true about chemical changes?

a)

No new substance is formed

b)

New substance is formed

c)

All chemical changes are reversible

64.

Which of them is not a chemical change?

a)

Baking cake

b)

Rusting of iron

c)

Cutting vegetables

65.

All changes takes place due to some______

a)

Cause

b)

Choice

66.

During condensation and evaporation of water, the ________ of water changes.

a)

Appearance

b)

State

c)

Movement

67.

The_______ balloon changes when we blow the air.

a)

Color

b)

Shape

68.

A chemical change is_______

a)

Permanent

b)

Temporary

c)

None of the avove

d)

Both of these

69.

Melting of ice is an example of_______

a)

Chemical change

b)

Physical change

70.

Rusting of iron is an ________ change.

a)

Physical change

b)

Chemical change

c)

Desirable change

d)

Reversible change

71.

Rolling of chapathi and baking oh chapathi are the changes that,

a)

Can be reversed

b)

Cannot be reversed

c)

Can be reversed and cannot be reversed

d)

Cannot be reversed and can be reversed

72.

Increase in the volume of substances on heating,the substance will show the change in,

a)

Extension

b)

Expansion

c)

Exclusion

73.

Changes that lead to the formation of new substances are called_________.

a)

Physical change

b)

Chemical change

74.

Which of the following changes cannot be reversed?

a)

Milk to paneer

b)

Cold milk to hot milk

c)

Yarn to knitted sweater

d)

Wet clothes to dry clothes

75.

Which of the following can be reversed?

a)

Raw egg to boiled egg

b)

Wet clothes to dry clothes

c)

Bud of a flower

d)

Cow dung to bio-gas

76.

The process where the liquid changing into solid is called

a)

Evaporation

b)

Condensation

c)

Heating

d)

Boiling

77.

A change which is permanent in nature....

a)

Irreversible

b)

Reversible

78.

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?

a)

Yes

b)

No

79.

A change temporary in nature is,

a)

Reversible

b)

Irreversible

80.

Give an example of physical change

a)

kicking a football

b)

burning a paper

c)

growth of animals and plants

d)

cooking

81.

What is a reversible change?

a)

a change that cannot be reversed

b)

a change that can be reversed

c)

I don't know

d)

a change where a new substance is formed

82.

Melting of a popsicle is a reversible change

a)

true

b)

false

83.
Which of these is NOT a reversible change?
a)
Water to Ice
b)
Juice to Popsicle
c)
Cookie Dough to Cookie
d)
Melting Chocolate
84.
Changing liquid to a gas is called
a)
evaporation
b)
condensation
c)
melting
d)
freezing
85.
What is happening in the statement below?
The ice cube melted.
a)
Matter is changing from a liquid to a solid.
b)
Matter is changing from a liquid to a gas.
c)
Matter is changing from a solid to a liquid.
d)
Matter is changing from a gas to a liquid.
86.

The picture shows an example of a ______________ change.

a)

reversible

b)

freezing

c)

irreversible

d)

all of the above

87.
When heat is added to a solid, it ______________.
a)
freezes
b)
evaporates
c)
melts
d)
condenses
88.

One cup of water is left outside for two days when it was checked there was only half a cup left. What happened?

a)

sublimation

b)

condensation

c)

evaporation

d)

distillation

89.

Freezing juice is an example of a(n) ________

a)

irreversible change

b)

reversible change

90.
a)

Reversible Change

b)

Irreversible Change

c)

Both options are correct

d)

None of the above

91.

A teacher wants to show clear difference between reversible and irreversible changes, which one of the following will be suitable for the same

a)

boiling of milk and freezing it

b)

Boiling milk and making paneer

c)

melting ice and freezing it

92.

Folding of paper is a ____________ change while burning it is a _____________ change.

a)

reversible , reversible

b)

reversible, irreversible

c)

irreversible, reversible

93.

Which one of the following is a beneficial change?

a)

rusting of iron object

b)

spoilage of food

c)

ripening of fruit

d)

souring of milk

94.

The iron blade of a soil digging tool is fixed to a wooden handle by the process of ______________.

a)

melting

b)

contraction

c)

expansion

d)

freezing

95.

All changes takes place due to some______

a)

Cause

b)

Choice

96.

During condensation and evaporation of water, the ________ of water changes.

a)

Appearance

b)

State

c)

Movement

97.

The_______ balloon changes when we blow the air.

a)

Color

b)

Shape

98.

Rolling of chapathi and baking oh chapathi are the changes that,

a)

Can be reversed

b)

Cannot be reversed

c)

Can be reversed and cannot be reversed

d)

Cannot be reversed and can be reversed

99.

Increase in the volume of substances on heating,the substance will show the change in,

a)

Extension

b)

Expansion

c)

Exclusion

100.

Changes that lead to the formation of new substances are called_________.

a)

Physical change

b)

Chemical change

101.

Which of the following changes cannot be reversed?

a)

Milk to paneer

b)

Cold milk to hot milk

c)

Yarn to knitted sweater

d)

Wet clothes to dry clothes

102.

Which of the following can be reversed?

a)

Raw egg to boiled egg

b)

Wet clothes to dry clothes

c)

Bud of a flower

d)

Cow dung to bio-gas

103.

The process where the liquid changing into solid is called

a)

Evaporation

b)

Condensation

c)

Heating

d)

Boiling

104.

The burning of wood

a)

Can be reversed

b)

Cannot be reversed

c)

Can be expanded

d)

Can be melted

105.

Pick the change that can be reversed from the following

a)

Cutting of trees

b)

Melting of butter

c)

Burning of candle

d)

Blooming of flower

106.

What is a reversible change?

a)

a change that cannot be reversed

b)

a change that can be reversed

c)

I don't know

d)

a change where a new substance is formed

107.

The picture shows an example of a ______________ change.

a)

reversible

b)

freezing

c)

irreversible

d)

all of the above

108.

One cup of water is left outside for two days when it was checked there was only half a cup left. What happened?

a)

sublimation

b)

condensation

c)

evaporation

d)

distillation

109.

Folding of paper is a ____________ change while burning it is a _____________ change.

a)

reversible , reversible

b)

reversible, irreversible

c)

irreversible, reversible

110.

The iron blade of a soil digging tool is fixed to a wooden handle by the process of ______________.

a)

melting

b)

contraction

c)

expansion

d)

freezing

111.

Which one of the following is a beneficial change?

a)

rusting of iron object

b)

spoilage of food

c)

ripening of fruit

d)

souring of milk

112.

Which one of the following is a reversible change

a)

Tearing of paper

b)

Blowing air in a balloon

c)

Breaking of stick

d)

Baked chapati

113.

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.

a)

Reversible : (ii), (iii), (v)

b)

Irreversible changes : (i), (iv), (vi), (ii)

c)

Reversible : (iii), (ii), (iv)

d)

Irreversible changes : (i), (v), (vi), (vii).

114.

On continuously heating water into a pan -

a)

The quantity of water in the pan decreases

b)

The quantity of water in the pan increases

c)

The quantity of water in the pan remains constant

d)

Can’t say anything in this case

115.

Which among the following is a physical change?

a)

cutting a log

b)

burning a wood

c)

ripening of fruit

d)

cooking of food

116.

Which of the following statements is true?

a)

Setting of milk to form curd is a chemical change and reversible change.

b)

Spoiling of food is a chemical and irreversible change.

c)

Burning of paper is a physical and reversible change.

d)

Boiling of an egg is a physical and reversible change.

117.

Study the venn diagram. What does centre point X represents?

a)

making paper boat

b)

Burning crackers

c)

Blowing a balloon

d)

rusting of a bicycle

118.

Which change represents point 1?

a)

Evaporation of water

b)

chopping of vegetables

c)

Burning of wood

d)

setting of milk

119.

Which change represents point 2?

a)

bursting of balloon

b)

condensation of water

c)

tearing a paper

d)

setting of Plaster of Paris

120.

Which change represents point 3?

a)

tearing of paper

b)

burning of LPG gas

c)

bursting of cracker

d)

melting of wax.

121.

Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a –

a)

a physical change that can be reversed.

b)

the chemical change that can be reversed.

c)

a physical change that cannot be reversed.

d)

the chemical change that cannot be reversed.

122.

Which of the following statement is incorrect for a chemical reaction?

a)

Heat may be given out but never absorbed.

b)

The sound may be produced.

c)

A colour change may take place.

d)

A gas may be evolved.

123.

Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability?

a)

It is more than 7 metres high.

b)

It weighs about 6000 kg.

c)

It was built more than 1600 years ago.

d)

It has not rusted after such a long period.

124.

Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and a then a small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and Step II are:

a)

physical and chemical changes, respectively.

b)

chemical and physical changes, respectively.

c)

both physical change.

d)

both chemical change.

125.

Which of the following is an irreversible change?

a)

Combing hair

b)

Crushing a can

c)

Burning paper

d)

Dissolving salt in water

126.

Which of the following is reversible change?

a)

Bending a wire

b)

Making tea

c)

Rusting of iron

d)

Sprouting a seed

127.

Which of the following is a chemical change?

a)

Harvesting cotton fibres

b)

powdering jeera seeds

c)

Making cheese from milk.

d)

Cutting an apple

128.

Which of the following is an application of expansion due to heat.

a)

Rotating of a fan

b)

Rusting of iron

c)

Working of a television

d)

Working of a mercury thermometer

129.

Which of the following contracts the least.

a)

Solida

b)

Liquids

c)

Gases

d)

All contract equally.

130.

From which of the following containers do you think maximum evaporation will take place?

a)
b)
c)
d)
131.

In all reversible changes, the internal structure of the substances remains the (a)  

132.

The gas or vapour of a substance can be changed back to liquid by (a)  

133.

In chemical changes, original substances (a)   be obtained easily.

134.

When a material is heated, the space between its particles (a)  

135.

The amount of energy required in a physical change is usually (a)  

136.

UNJUMBLE : OPRDCUST

(a)  

137.

UNJUMBLE : SERACTANT

(a)  

138.

UNJUMBLE : ACTAYLST

(a)  

139.

UNJUMBLE : TCONRACTION

(a)  

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