9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கற்கண்டு (இலக்கணம்) - தொடர் இலக்கணம், ஆகுபெயர் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -விரிவானம் (துணைப்பாடம்) - தாய்மைக்கு வறட்சி இல்லை! Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கவிதை பேழை (செய்யுள்) - மார்கழி பெருவிழா Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர்-இலக்கணம் - பகுபத உறுப்பிலக்கணம் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர் - இலக்கணம்-எழுத்து -அளபெடை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர்-துணைப்பாடம் - ஆறாம்திணை Important Questions And Answers Study Material - QB365 Set A
Published on: 31/08/2026
Download Tamil Nadu 9th 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 Test
1.
___________ is the smallest cell in the male body.
Neuron
Nephron
Sperm
Body cells
2.
_________ pairs of salivary glands are present in the mouth cavity.
One
Two
Three
Four
3.
The process of nutrition begins with intake of food called __________.
digestion
ingestion
assimilation
egestion
4.
Lysozyme is seen in_______
gastric juice
intestinal juice
Bile
saliva
5.
Transpiration takes place through _____________.
fruit
seed
flower
stomata
6.
Chlorophyll in a leaf is required for __________.
photosynthesis
transpiration
tropic movement
nastic movement
7.
The bending of root of a plant in response to water is called _________
thigmonasty
phototropism
hydrotropism
photonasty
8.
The tropic movement that helps the climbing vines to find a suitable support is ________.
phototropism
geotropism
thigmotropism
chemotropism
9.
Roots growing downwards away from light
10.
Shoots growing upward
11.
Shoots growing towards the light
12.
Roots growing downwards into soil
13.
Define transpiration.
14.
Photosynthesis converts energy X into energy Y.
a) What are X and Y?
b) Green plants are autotrophic in their mode of nutrition. Why?
15.
Name the plant part
a) Which bends in the direction of gravity but away from the light.
b) Which bends towards light but away from the force of gravity.
16.
What is nastic movement?
17.
Plants take in carbondioxide for photosynthesis but need ___________ for their living.
18.
The response of a plant part towards gravity is __________.
19.
What are the differences between tropic and nastic movements.
20.
Explain the types of tropisms.
21.
Name the bile pigments.
22.
Name the bile salts.
23.
Tabulate the types of Teeth and its functions.
24.
Name the glands associated with the digestive system.
25.
What is chyme?
26.
1.
(c)
Sperm
2.
(c)
Three
3.
(b)
ingestion
4.
(d)
saliva
5.
(d)
stomata
6.
(a)
photosynthesis
7.
(c)
hydrotropism
8.
(c)
thigmotropism
9.
Negative phototropism
10.
Negative geotropism
11.
Positive phototropism.
12.
Positive geotropism
13.
The loss of water in the form of water vapour from the aerial parts of the plant body is called transpiration.
14.
(a) X is light energy.
Y is chemical energy.
(b) They have chlorophyll. So they have prepared their own food. So plants are autotropic in mode of nutrition.
15.
(a) Root
(b) Shoot
16.
In plants the movement of opening and closing of the flowers are not directed towards stimuli. Such movement in plants are called as Nastic movements.
17.
( )
Oxygen
18.
( )
Geotropism or Gravitropism
19.
| Tropic movements | Nastic movements |
| Unidirectional response to the stimulus Growth-dependent movements More or less permanent and irreversible Found in all plants Found in a plants Slow action |
Non-directional response to the stimulus movements |
20.
Unidirectional movement of plant part to light stimulus is called Phototropism. The plant may also respond to gravity and it is termed Geotropism or Gravitropism. The response to water is called Hydrotropism. Once the shoot touches a suitable support, it grows towards the surface it is touching. This is called Thigmotropism. Growth or movement of a plant in response to chemical stimuli is called Chemotropism.
21.
i) Bilirubin
ii) Bilivdin
22.
i) Sodium glycolate
ii) Sodium tauraglycolate
23.
Incisors, canines, premolars and molars are the teeth present in human beings.
24.
The glands associated with the digestive system are the salivary gland, gastric glands, pancreas, liver and intestinal glands.
25.
The action of the gastric juice and churning of food in the stomach convert thebolus into a semi digested food called chyme
26.
9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - மணிமேகலை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - ஏறு தழுவுதல் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர் - தண்ணீர் Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
