Showing posts with label class9-science. Show all posts
Showing posts with label class9-science. Show all posts

Monday, 11 June 2018

Class 11/10/9/8 - Chemistry - Uses of Gases (Worksheet) (#eduvictors)(#cbsenotes)

Uses of Gases 

(Worksheet)
Class 11/10/9/8 - Chemistry - Uses of Gases (Worksheet) (#eduvictors)(#cbsenotes)

Fill the blanks:

1. The gas that can be used to fill party balloons is _______.

2. The gas that is used to make flash light is _______ .

3. The gas widely used in advertisement signs is _______.

4. The gas present in tungsten bulb is _______.

5. The gas present in the universe is _______.

Tuesday, 22 May 2018

CBSE Class 9 - Chemistry - Matter in Our Surroundings (MCQs) (#cbsenotes)(#eduvictors)

Matter in Our Surroundings
(MCQs)

CBSE Class 9 - Chemistry - Matter in Our Surroundings (MCQs) (#cbsenotes)(#eduvictors)


1. ______ is a physical quantity which expresses the amount of matter in a body.

(A) Mass
(B) Density
(C) Volume
(D) Temperature


2. The space inside a container that is occupied by matter is its ______.

(A) density
(B) mass
(C) volume
(D) shape


3. ______ is the ratio of mass of a substance to its volume.

(A) Viscosity
(B) Fluidity
(C) Density
(D) Elasticity


Wednesday, 9 May 2018

CBSE Class 9 Chemistry - Matter in our surroundings - Unit Test Paper (#cbsenotes)(#eduvictors)

Matter In Our Surroundings

(Unit Test Paper)



CBSE Class 9 Chemistry - Matter in our surroundings - Unit Test Paper (#cbsenotes)(#eduvictors)

Matter in our surroundings 
Unit Test Paper

1. What is the physical nature of  matter? 

2. What are the characteristics of particles of matter? 

3. Why do the particles  mix faster in gases than in solids or liquids? 

4. Why can you smell an incense stick in the whole room even if it is lit at one place? 

5. Comment on the properties of matter in tabulated form keeping in mind the rigidity,  compressibility, kinetic energy,  fluidity and density.

Saturday, 14 April 2018

Entrance Exams/CTET/NTSE/Class 9 - Agricultural Revolutions (#ntsenotes)(#entranceexams)(#eduvictors)

Agricultural Revolutions

Entrance Exams/CTET/NTSE/Class 9 - Agricultural Revolutions (#ntsenotes)(#entranceexams)(#eduvictors)


Protein Revolution 
- higher productivity (Technology driven 2nd green revolution)
- coined by - Modi & Arun Jaitely

Green Revolution 
- Food grains
         - Green revolution "word" COINED by  William S Goud - UK

White Revolution or Operation Flood
-Milk production
-VARGHESE KURIEN

Sunday, 1 April 2018

Class 7/8/10 - Forests Our Life Line or Natural Resources - Importance of Forest Resources (#cbsenotes)(#eduvictors)

Natural Resources - Importance of Forest Resources

Class 7/8/10 - Forests Our Life Line or Natural Resources - Importance of Forest Resources (#cbsenotes)(#eduvictors)

The importance of forest resources can be described  as follows:

1. Ecological Balance
2. Renewable Natural Resources
3. Eco-system
4. Economic Development
5. Environment Quality
6. Safeguard against Pollution
7. Soil Conservation
8. Wind and Soil Erosion
9. Check the Extension Balance
10. Maintains Ecological Balance
11. Attracts Rainfall
12. Control Floods
13. Connects to our Cultural and Civilization
14. Supply of Raw Material


1. Ecological Balance: 

Forests and wildlife are essential to maintain ecological balance of an area.


Sunday, 14 January 2018

CBSE Class 9 - Biology - Why Do We Fall ill? (Q and A) (#cbseNotes) (#eduvictors)

Why Do We Fall ill? (Short Q and A)

CBSE Class 9 - Biology - Why Do We Fall ill? (Q and A) (#cbseNotes) (#eduvictors)

Q1: Define Health according to WHO?

Answer: According to WHO (World Health Organisation) health is a “state of physical, metal and social well-being of a person”.



Q2: When is WORLD HEALTH DAY celebrated?

Answer: On 7th April



Q3: Define Disease.

Answer: Any disturbance in the structure or function of any organ or part of body.



Q4: List any two conditions necessary for good health.

Answer:
(i) Good physical and social environment.
(ii) Good economic conditions.


Friday, 22 December 2017

Class 7/8/9/10 - Science - Clean Air: From Donora to Delhi - Can we breathe safely? (#eduvictors)(#cbse-notes)

Clean Air: From Donora to Delhi -
Can we breathe safely?

Class 7/8/9/10 - Science - Clean Air: From Donora to Delhi - Can we breathe safely? (#eduvictors)(#cbse-notes)

With the industrial revolution, the human mankind experienced the air pollution for the first time and realized it as a potential threat to human life. The black smoke of locomotives, factories from the industrial towns of England blackened its cities.

In 1950s, the smoke of industrialized Pennsylvania valley in USA made the air murkier. In the small town of Donora, population 14,000, residents suffered eye, nose, and throat irritation and breathing difficulties resulting in 20 deaths.

In 2008, on the 60th anniversary of the event, the town opened the Donora Smog Museum with the
slogan "Clean Air Starts Here".

Tuesday, 19 December 2017

CBSE Class 12/Class 11/Class 9 - DISCOVERIES IN ATOMIC STRUCTURE (#eduvictors)(#cbsenotes)

DISCOVERIES IN ATOMIC STRUCTURE

CBSE Class 12/Class 11/Class 9 - DISCOVERIES IN ATOMIC STRUCTURE (#eduvictors)(#cbsenotes)

1. Dalton(1803) : Proposed Atomic Theory

2. Julius Plucker (1859) : First discoverer of cathode rays

3. Goldstein(1886) : Discovered anode rays and proton

4. Sir.J.J.Thomson(1897) : Discovered electron and determined charge/mass(e/m) ratio for electron

5. Rutherford(1891) : Discovered nucleus and proposed atomic model

Friday, 6 October 2017

CBSE Class 9 - Biology - Why Do We Fall ill? ( Important Terms to Remember) (#cbseNotes)

Why Do We Fall Ill?  Important Terms to Remember 

CBSE Class 9 - Biology - Why Do We Fall ill? ( Important Terms to Remember) (#cbseNotes)

Here a few definitions are listed. Can you identify the terms defined here.


Decrease in number of RBCs and heamoglobin concentration.


A condition in which the normal functioning of the body or any part of it is damaged or disturbed.


A rapidly appearing disease, which lasts only in a few days.


A long lasting or a persisting disease.



Tuesday, 3 October 2017

CBSE Class 9 - Chemistry - Structure Of An Atom, Atoms & Molecules - Practice Test (#cbseNotes)

Chemistry - Structure Of An Atom, Atoms & Molecules - Practice Test

CBSE Class 9 - Chemistry - Structure Of An Atom, Atoms & Molecules - Practice Test (#cbseNotes)

M.M = 40

Q1. What are the failures of Dalton Atomic theory? (3)


Q2. State the law of constant Proportion? verify it for the reaction of 2.047g H₂ and 16.166g O₂ giving 18.210g water.(3)


Q3. How many molecules of water are present in a drop of water which has a mass of 50g? (2)


Q4. Oxygen is (a) Monovalent (b) Bivalent (c) Trivalent (d) Tetravalent        (1)


Q5. Define the terms:
a) Atomic number
b) Mass number       (2)

Monday, 18 September 2017

CBSE Class 9 - Physics - Density, Buoyancy and Archimedes' Principle (Assignment) (#cbseNotes)

Density, Buoyancy and Archimedes' Principle (Assignment)

CBSE Class 9 - Physics - Density, Buoyancy and Archimedes' Principle (Assignment) (#cbseNotes)


1. When we stand on loose sand, our feet go deep into the sand. But when we lie down on the sand our body does not go that deep in the sand. Why ?

2. Define relative density of a substance. Relative density of silver is 10.8. The density of water is 1000 kg/m³ What is the density of silver in SI units?

3. A cork floats in water, while the iron nail sinks. Give reason. (2)

4. State Archimedes' Principle. Based on this principle, write its two applications. (2)

5. (i) Define pressure. (2)
(ii) Why is it easy to walk on sand with flat shoes, than with high heel shoes?

Wednesday, 13 September 2017

CBSE Class 9 - Science - Half Yearly Examination Paper (2017-18) (#cbsePapers)

CBSE Class 9 - Science - Half Yearly Examination Paper (2017-18) 

CBSE Class 9 - Science - Half Yearly Examination Paper (2017-18) (#cbsePapers)
Class IX - Science - Half Yearly Examination (2017-18) - Question Paper:

Tuesday, 12 September 2017

CBSE Class 9 - Physics - Gravitation (Worksheet) (#cbseNotes)

Physics - Gravitation (Worksheet)

CBSE Class 9 - Physics - Gravitation (Worksheet) (#cbseNotes)


Fill in the blanks:

1. Motion of body with constant speed in a circular path is called ______________.


2. The acceleration which causes changes only in direction of the velocity of a body is called __________ and it is always directed ___________ the circle.


3. Every object in the universe ________ other bodies.


4. A body is said to be in _______ when only gravity acts on it.


5. ________ of an object is the force of gravity acting on it.


Friday, 1 September 2017

CBSE Class 9 - Physics - Gravitation - 51 Questions You must revise (#cbseNotes)

Gravitation - 51 Questions You must revise

CBSE Class 9 - Physics - Gravitation - 51 Questions You must revise (#cbseNotes)


Q1: What was geocentric model? Who proposed this theory?

Q2: What was heliocentric theory? Who proposed this?

Q3: If the mass of the body is 9.8 kg on the earth what would be its mass on the moon.

Q4: What are the Kepler Laws that govern the motion of the planets?

Q5(NCERT/CBSE 2010): State the universal law of gravitation.

Q6(NCERT): What is the importance of Universal Law of Gravitation?
      or
Q(CBSE 2010): State any one phenomena related to the Universal Law of Gravitation.


Q7(CBSE 2010): Why is G called the Universal Constant?


Q8: Who measured the value of G first time, experimentally?


Q9(CBSE 2010/NCERT): What is the gravitational force between the Earth and a body called? In which direction does it occur?

Thursday, 31 August 2017

CBSE Class 9 - Biology - Tissues - Name the following (#cbseNotes)

Class 9 - Biology - Tissues
Name the following

CBSE Class 9 - Biology - Tissues - Name the following  (#cbseNotes)

Question. Name the following:

Tissue that forms the inner lining of our mouth

Tissue that transports food in plants

It provides buoyancy to lotus plant help it float.

Tissues present in lung alveoli

Connective Tissue with a fluid matrix

Sunday, 20 August 2017

Class 9 - Biology - Tissues - 15 Amazing Facts About Blood That You Should Know (#cbseNotes)

15 Amazing Facts About Blood
That You Should Know

Class 9 - Biology - Tissues - 15 Amazing Facts About Blood That You Should Know (#cbseNotes)

Human heart pumps the blood 36 thousand liters of blood in the distance of 20 thousand kilometers in a day.

Blood is a fluid connective tissue.

Human blood is red in colour due to the presence of red pigment i.e. haemoglobin.





The blood is always not red in all animals. The cockroach has white blood where as there is blue coloured blood in a snail.

Friday, 4 August 2017

CBSE Class 9 - Science - FORCE AND LAWS OF MOTION - Very Short Answer Questions You must Know (#cbseNotes)

FORCE AND LAWS OF MOTION


Class 9 - Physics

CBSE Class 9 - Science - FORCE AND LAWS OF MOTION - Very Short Answer Questions You must Know (#cbseNotes)



Very Short Answer Questions that you must know.


Q1: Give an example that force can make a stationary body move.

Answer: A football can be set to move by kicking it, i.e. by applying a force.



Q2: Name the scientist who experimented with moving balls on a ramp and proved that objects move with constant speed and when no force acts on them.

Answer: Galileo



Q3: Force can change the shape and size of an object. Give an example.

Answer: By hammering, a block of metal can be turned into a thin sheet. By hammering, a stone can be broken into pieces.



Q4: Why does a bicycle slow down when the cyclist stop pedalling? 

Answer: This is because of the frictional forces acting opposite to the direction of motion.



Q5: What are balanced forces?

Answer: If the resultant of applied forces is equal to zero, it is called balanced forces.