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: 06/02/2020
9th Standard Science 2 Mark Important Questions (Bookback and Creative)
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 Test1.
What is a satellite? What are the two types of satellites?
2.
Define time period of a satellite.
3.
What is Forensic chemistry related to?
4.
What are called Anaesthetics? How are they classified?
5.
Which three resin codes are unsafe?
6.
How many valence electrons are there in carbon?
7.
Interpret: Acetic acid (CH3COOH) is a mono basic acid.
8.
What is the contribution of Joseph Murray in Nephrology?
9.
What are metalloids? Give examples
10.
What are s-block elements?
11.
Define magnetic shielding
12.
What is zygotene?
13.
Heat gained by a body depends upon which factors?
14.
Write the names of male and female sex hormone.
15.
Arrange the following five steps of nutrition in correct sequence: (digestion, assimilation, ingestion, egestion, absorption)
16.
Name the connective tissue with a fluid matrix.
17.
Give two types of Sclerenchyma.
18.
State modern periodic law.
19.
Draw and label the diagram of an AC generator.
20.
List the main parts of an electric motor.
21.
Define electric field.
22.
What are electric lines of force?
23.
How much heat energy is required to change 2 kg of ice at 0ºC into water at 20ºC? (Specific latent heat of fusion of water = 3,34,000J/kg, Specific heat capacity of water = 4200JKg-1K-1).
24.
What is the heat in joules required to raise the temperature of 25 grams of water from 0ºC to 100ºC? What is the heat in Calories?
(Specific heat of water = 4.18 J/gºC)
25.
What are called pneumatic bones?
26.
What are nucleons?
27.
Who was the first programmer?
28.
You must have seen brass statues in museums and places of worship. Brass is an alloy made up of approx.30% zinc and 70% copper. Is Brass a pure substance or a mixture or compound?
29.
Name any two essential fatty acids.
30.
Define magnification.
31.
How is washing machine wash the clothes?
32.
Calculate the correct readings of the Vernier caliper L.C. 0.01 em Zero correction - Nil.
| S.No. | M.S.R | V.C | Observed Reading = M.S.R + (V.C x L.C) | Correct Reading |
| 1 | 3 | 4 | ||
| 2 | 3 | 7 |
33.
What are the sub-phylum of prochordates?
34.
What is acrania?
35.
Why does a ray of light bend when it travels from one medium to another?
36.
Copy this figure in your answer book and show the direction of the light ray after reflection
37.
Differentiate: Macronutrients from micronutrients.
38.
Study the pictures below and then complete the table by putting a plus (+) if the shoot or root grows towards the stimulus and a minus (-) if it grows away from it.
| Stimulus | Light | Gravity |
|---|---|---|
| Shoot | + | - |
| Root | ? | + |
39.
Give the technical terms for the following:
a) Growth dependent movement in plants.
b) Growth independent movement in plants.
40.
Compare the charge and mass of protons and electrons.
41.
Name an element which has the same number of electrons in its first and second shell
42.
Name the sublimate that you will be getting when you heat a mixture of
i. Iodine and sand
ii. Sodium chloride and ammonium chloride.
43.
A few drops of ‘Dettol’ when added to water the mixture turns turbid. Why?
44.
Can you find the diameter of a thin wire of length 2 m using the ruler from your instrument box?
45.
Define least count of any device.
46.
The doctor advices an adolescent girl who is suffering from anaemia to include more of leafy vegetables and dates in her diet. Why so?
1.
A body moving in an orbit around a planet is called Satellite.
They are two types.
i) Man made or Artificial Satellites
ii) Natural Satellites.
2.
Time taken by a satellite to complete one revolution round the earth is called time period.
Time period T = \(\frac { Distances covered }{ Orbital velocity }\)
3.
Forensic chemistry applies scientific principles, techniques and methods to investigate a crime.
4.
The drugs which cause loss of sensation are called anaesthetics. They are given to patients when they undergo surgery.
There are two types.
i) General anaesthetics ii) Local anaesthetics
5.
6.
Four valence electrons termed as tetravalency.
7.
Though acetic acid contains four hydrogen atoms only one hydrogen can be replaced in its aqueous solution. So CH3COOH is a mono basic acid.
CH3COOH H+ + CH3COO-
8.
He performed the first successful kidney transplant operation.
9.
Elements which have the properties of both metals and non-metals are called as metalloids. (eg) Boron, Arsenic.
10.
Elements whose valence electron is filled in s subshell is known as s-block elements
11.
The process of stopping the magnetic field from entering into a region is called magnetic shielding.
12.
During zygotene of mieotic prophase I, the pairing of homologous chromosomes takes place. This is called synapsis
13.
1. Mass of the body
2. Change in temperature of the body
3. Nature of the material of the body.
14.
Male sex hormone - Testosterone
Female sex hormone - Oestrogen
15.
ingestion, digestion, absorption, assimilation, egestion
16.
Blood and lymph
17.
Sclerenchyma cells are grouped into (a) fibres and (b) sclereids.
18.
Modern periodic law states that "The Chemical and Physical properties of elements are the periodic functions of their atomic number".
19.
20.
NS - permanent magnet
ABCD - coil wire
B1 B2 - carbon brushes
S1 S2 - split ring
21.
Electric field is the region around a charged body within which its influence can be experienced (i.e) within which it can attract or repel another charged body.
22.
The lines representing the electric field are called electric lines of force
23.
Mass (m) = 2 kg
Specific heat capacity (c) = 4200 Jkg-1 K-1
Temperature variation (\(\triangle \)t) = 20oC -0oC = 20oC
Specific latent heat (L) = 3,34,000 J/kg
Heat energy required = mc\(\triangle \)t + ml
= (2 x 4200 x 20) + (2 x 3, 34,000)
= 168000 + 668000
= 836000 J
24.
Mass of water = 25 grams
\(\triangle\)T = (100oC - 0oC) =100oC
C = 4.18 J/goC
Heat energy required Q = M x C x \(\triangle\)T
= 25 x 4.18 x 100oC
= 10450 j
25.
The bones filled with air.
26.
The proton and neutrons are collectively called as nucleons.
27.
Lady Augusta Ada Lovelace was honored as the. first programmer as she gave the first programming to do arithmetic operations.
28.
Brass is not a pure substance. It is a mixture.
29.
1. Alpha - linolenic acid and
2. Linoleic acid
30.
The ratio of the height of the image to the height of the object.
Magnification = \(\frac { Image\ height }{ Object\ height } \)
31.
A spin dryer removes excess water from clothing by rotating a perforated drum at high speed. The water is thrown out through the holes. The clothes keep moving in a circle because the contact force of the drum provides centripetal force.
32.
| S.No. | M.S.R | V.C | Observed Reading = M.S.R + (V.C x L.C) | Correct Reading |
| 1 | 3 | 4 | 3 + (4 x 0.01) | 3.04 |
| 2 | 3 | 7 | 3 + (7 x 0.01) | 3.07 6.11 ____ 2 |
Correct reading = 3.55 cms.
33.
1. Hernichordata
2. Cephalochordata
3. Urochordata
34.
The prochordates do not have a Cranium or skull. They are referred to as Acrania.
35.
Deviation in the path of light is due to change of velocity of light in the different medium
36.
A ray passing through the principal focus of a concave mirror after reflection will emerge parallel to the principal axis.
37.
| Macronutrients | Micronutrients |
| 1. Calcium, sodium, potassium are macronutrients. |
Iron and iodine are micronutrients. |
| 2. Nutrients required for growth and development of the body in large quantities. |
Nutrients required for growth and development of the body in small quantities. |
38.
'-'
39.
(a) Tropic movement
(b) Nastic movement
40.
| Particle | Mass | Charge |
| Proton | 1.672 x 10-24 g | 1.602 x 10-19 C |
| Electron | 9.108 x 10-28 g | -1.602 x 10-19 |
41.
Beryllium.
42.
(i) Iodine is the sublimate that we will be getting when we heat a mixture of iodine and salt.
(ii) Ammonium chloride is the sublimate in the mixture of sodium chloride and Ammonium chloride.
43.
Dettol diffuse water. So the water turns turbid.
44.
No. I cannot find the diameter of a thin wire by using the ruler.
45.
Least count is least distance measured by a device. In Vernier Caliper the value of one smallest main scale division is divided with total number of vernier scale division.
46.
The adolescent girl affected by Anaemia blood contain Haemoglobin is very low because she takes very less amount of micro-nutrients like iron. So doctor advised to her to take leafy vegetables and dates. It contain large amount of Iron.
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
