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Tamilnadu 6th Standard Tamil இயல் 2 - கூடித் தொழில் செய் - சுட்டு எழுத்துகள், வினா எழுத்துகள் Important Questions And Answers Study Material - QB365 Set A
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Tamilnadu 6th Standard Tamil பருவம் 1 - இயல் 1 - மொழி -தமிழ்த்தேன் - இன்பத்தமிழ் Important Questions And Answers Study Material - QB365
NEW6th Standard
Tamilnadu 6th Standard Social Science T3 - குடிமையியல் - உள்ளாட்சி அமைப்பு - ஊரகமும் நகர்ப்புறமும் Important Questions And Answers Study Material - QB365 Set B
Published on: 13/12/2019
Changes Around Us
Download Tamil Nadu 6th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
Bursting of fire crackers is a _______change whereas germination of seeds is a ______change. (slow / fast)
2.
Plants convert Carbon-di-oxide and water into starch. This is an example of _____________change. (natural / human made)
3.
Changes that are harmful to us are_______________(desirable / undesirable)
4.
Boiling of egg results in_________change. (a reversible / an irreversible)
5.
Magnet attracts iron needle. This is ________change. (a reversible / an irreversible)
6.
In a solution of salt in water, water is the solute.
7.
Digestion of food is a physical change.
8.
Change of New moon to Full moon is human made.
9.
Burning of match stick is a reversible change.
10.
Growing of teeth in an infant is slow change.
11.
Inflating a balloon, popping a balloon, fading of wall paint, burning of kerosene
12.
Rotting of an egg, condensation of water vapour, trimming of hair, Ripening of fruit
13.
Glowing of a bulb, lighting of a Candle, breaking of a coffee mug, curdling of milk
14.
Growth of a child, Blinking of eye, Rusting, Germination of a seed
15.
What is a solution?
16.
Define a slow change.
17.
You are given some candle wax. Can you make a candle doll from it? What kind of change is this?
18.
What kind of a change is associated with decaying of a plants?
19.
What type of changes is associated with germination of a seed? Explain
20.
Can deforestation be considered a desirable change? Explain.
21.
What happen when paper is burnt? Explain.
22.
Give one example for each case that happens around you.
a. Slow and fast change
b. Reversible and irreversible change
c. Physical and chemical change
d. Natural and man-made change
e. Desirable and undesirable change
23.
When a candle is lit the following changes are observed.
a. Wax melts.
b. Candle keeps burning.
c. The size of the candle decreases.
d. The molten wax solidifies
e. Which of the changes can be reversed? Justify your answer.
24.
Air pollution leading to Acid rain is a
reversible change
fast change
natural change
human made change
25.
Out of the following an example of a desirable change is
rusting
change of seasons
earthquake
flooding
26.
Formation of curd from milk is
a reversible change
a fast change
an irreversible change
an undesirable change
27.
Drying of wet clothes in air is an example of
Chemical change
Undesirable change
irreversible change
physical change
28.
When ice melts to form water, change occurs in its
position
colour
state
composition
1.
( )
slow,fast
2.
( )
natural
3.
( )
undesirable
4.
( )
an irreversible
5.
( )
a reversible
6.
False - Correct statement: In a solution of salt in water, water is the solvent
7.
False - Correct statement: Digestion of food is an irreversible change
8.
Flase - Correct statement: Change of new moon to full moon is natural
9.
False - Correct statement: Burning of match stick is an irreversible change.
10.
True
11.
burning of kerosene
Reason : It is a chemical change.
12.
trimming of hair
Reason : It is a man-made change.
13.
curdling of milk
Reason : It is a chemical change (or) It is a slow change
14.
Blinking of eye
Reason : It is a fast change
15.
When solute is dissolved in a solvent it forms a solution.
Solute + Solvent ⟶ Solution
16.
Changes which take place over a long period of time are known as Slow changes.
17.
Yes, we can make a candle doll from candle wax. It is a kind of physical change.
18.
Plants decaying is a chemical change.
19.
(i) Germination of a seed can take more days. Because, it is a slow change.
(ii) "Changes which take place over a long period of time are known as slow changes".
20.
No. Deforestation can be an undesirable change. That is, Deforestation is harmful to our environment and not desired by us.
21.
(i) Burning of paper takes place within a short period of time. So, it is a fast change
(ii) In this process, carbon-di-oxide and water are produced with heat and light energies.
22.
(a) Slow and fast change
(i) Slowchange - Changeofseasons
(ii) Fast change - Bursting of fire crackers
(b) Reversible and irreversible change
(i) Reversible change - Stretching of rubber
(ii) Irreversible change - Digestion of food
(c) Physical and chemical change
(i) Physical change - Melting of Ice
(ii) Chemical change - Rusting of Iron
(d) Natural and man-made change
(i) Natural change - Rotation of the earth
(ii) Man-made change - Cooking
(e) Desirable and undesirable change
(i) Desirable change - Milk changing to curd
(ii) Undesirable change - Deforestation
23.
a) melting of wax and
d) Solidification of the molten wax can be reversed.
Burning of candle is a physical / reversible change. That is,
\(\text { Solid wax } \underset{\text { Cooling }}{\stackrel{\text { Heating }}{\rightleftarrows}} \text { molten wax }\)
24.
(d)
human made change
25.
(b)
change of seasons
26.
(c)
an irreversible change
27.
(d)
physical change
28.
(c)
state
6th Standard Syllabus & Materials
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Tamilnadu 6th Standard Social Science T3 - குடிமையியல் - உள்ளாட்சி அமைப்பு - ஊரகமும் நகர்ப்புறமும் Important Questions And Answers Study Material - QB365 Set A
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Tamilnadu 6th Standard Social Science T3 - குடிமையியல் - மக்களாட்சி Important Questions And Answers Study Material - QB365 Set B
NEW6th Standard
Tamilnadu 6th Standard Social Science T3 - குடிமையியல் - மக்களாட்சி Important Questions And Answers Study Material - QB365 Set A
NEW6th Standard
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