6th Standard Syllabus & Materials
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Published on: 05/09/2026
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.
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1.
The unit of measurement used for expressing dimension (size) of cell is _________
centimeter
millimeter
micrometer
meter
2.
Formation of curd from milk is
a reversible change
a fast change
an irreversible change
an undesirable change
3.
When ice melts to form water, change occurs in its
position
colour
state
composition
4.
When an object is heated, the molecules that make up the object
begin to move faster
lose energy
become heavier
become lighter
5.
Bacteria are very small _________ microorganism.
Prokaryotic
Eukaryotic
Protozoa
Acellular
6.
The egg of an Ostrich is the________ single cell.
7.
I am like a policeman. Who am I _______?
8.
Boiling of egg results in_________change. (a reversible / an irreversible)
9.
Solids_________ on heating and______ on cooling.
10.
Influenza is a ___________ disease.
11.
Spirogyra : Plant cell :: Amoeba : _________.
12.
Burning of matchstick :_______ change: Rotation of the Earth : Slow change
13.
Photosynthesis : __________ change:: burning of coal : Human – made change.
14.
Total Kinetic Energy of molecules: Heat :: Average Kinetic Energy : __________
15.
Iodine : Goitre :: Iron : _____.
16.
Shiva said “ Bigger onion has larger cells when compared to the cells of smaller onion”! Do you agree with his statement or not ? Explain Why?
17.
What are the organelles found only in plant cell?
18.
What happens when cane sugar is strongly heated? Mention any two changes in it.
19.
What is thermal expansion?
20.
Mention any two viral diseases.
21.
Draw a neat labelled diagram of a prokaryotic cell.
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.
Explain thermal expansion with suitable examples.
24.
Tabulate the vitamins and their corresponding deficiency diseases.
25.
Energy producer
26.
Food producer (Plant cell)
27.
Ice cube
28.
Temperature
29.
Vitamin B
30.
Identify any four parts of the Plant cell.
31.
What happen when paper is burnt? Explain.
32.
Distinguish between heat and temperature.
1.
(c)
micrometer
2.
(c)
an irreversible change
3.
(c)
state
4.
(a)
begin to move faster
5.
(c)
Protozoa
6.
( )
eukaryotic
7.
( )
Cell wall
8.
( )
an irreversible
9.
( )
expand, contract
10.
( )
viral (virus)
11.
Animal cell
12.
Fast
13.
natural
14.
Temperature
15.
Anaemia.
16.
I can't agree his statement. Because cell sizdhas no relation to the size of an organism.
17.
Cell wall and chloroplast found only in plant cell
18.
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
19.
The expansion of a substance on heating is called, the thermal expansion of that substance.
20.
i) Common cold
ii) Influenza
21.
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.
The expansion of substance on heating is called, the thermal expansion of that substance
(i) Gaps are left in between rails while laying railway track :
So that there is enough margin for the tracks to expand and contract due to the temperature changes. If that gap is not left then the tracks might have enormous stress in them while expanding due to heat, which can damage them.
(ii) Gaps are left in between two joints of a concrete bridge:
Thermal expansion takes place due to the increase in the kinetic energy of the constituent molecules as they are heated. Thermal expansion is the reason we leave some gaps between section of h concrete bridge.
24.
| S.no | Property | deficiency disease |
| 1 | vitamin A | Night blindness |
| 2 | vitamin B | Beri beri |
| 3 | vitamin C | Scurvy |
| 4 | vitamin D | Rickets |
| 5 | vitamin E | Nervous weakness, dimming of eyesight |
| 6 | vitamin K | Weakness of the bones, teeth etc. |
25.
Mitochodria
26.
Chloroplasts
27.
0oC
28.
kelvin
29.
Beri beri
30.
31.
(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.
32.
| HEAT | TEMPERATURE |
| i) Heat is an energy | The measurement of warmness or coldness of a substance |
| ii) Heat not only depends on the temperature of the substance but also depends on how many molecules are there in the object | Temperature is related to how fast the atoms or molecules move or vibrate within the substance. |
| iii) Heat measures the total kinetic energy of molecules | Temperature measures the average kinetic energy of molecules |
| iv) SI unit of heat is Joule | SI unit of temperature is kelvin |
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Tamilnadu Stateboard 6th Standard Subjects
Tamilnadu Stateboard Standards
