6th Standard Syllabus & Materials
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Published on: 06/09/2019
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.
In a solution of salt in water, water is the solute.
5.
Digestion of food is a physical change.
6.
Change of New moon to Full moon is human made.
7.
Burning of matchstick :_______ change: Rotation of the Earth : Slow change
8.
Cooking of food : desirable change :: decaying of food : _________change
9.
What is a solution?
10.
What happens when cane sugar is strongly heated? Mention any two changes in it.
11.
You are given some candle wax. Can you make a candle doll from it? What kind of change is this?
12.
What type of changes is associated with germination of a seed? Explain
13.
What happen when paper is burnt? Explain.
14.
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.
15.
Air pollution leading to Acid rain is a
reversible change
fast change
natural change
human made change
16.
Formation of curd from milk is
a reversible change
a fast change
an irreversible change
an undesirable change
17.
Drying of wet clothes in air is an example of
Chemical change
Undesirable change
irreversible change
physical change
1.
( )
slow,fast
2.
( )
natural
3.
( )
undesirable
4.
False - Correct statement: In a solution of salt in water, water is the solvent
5.
False - Correct statement: Digestion of food is an irreversible change
6.
Flase - Correct statement: Change of new moon to full moon is natural
7.
Fast
8.
undesirable
9.
When solute is dissolved in a solvent it forms a solution.
Solute + Solvent ⟶ Solution
10.
On strong heating, cane sugar chars to almost pure carbon giving the smell of 'Burnt sugar'.
(i) Initial change - Physical change - melting
(ii) Final change - Chemical change - charring
11.
Yes, we can make a candle doll from candle wax. It is a kind of physical change.
12.
(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".
13.
(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.
14.
a) melting of wax and
d) Solidification of the molten wax can be reversed.
Burning of candle is a physical / reversible change. That is,
\(\text { Solid wax } \underset{\text { Cooling }}{\stackrel{\text { Heating }}{\rightleftarrows}} \text { molten wax }\)
15.
(d)
human made change
16.
(c)
an irreversible change
17.
(d)
physical change
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Tamilnadu Stateboard 6th Standard Subjects
Tamilnadu Stateboard Standards
