CBSE Class 9 paper

CBSE Class 9 Physics Fill In The Blanks for Force and Laws of Motion.

1. Newton’s first law of motion defines …………………..

2. ……………….. Is the property of a body due to which it resists a change in its state of rest or of uniform motion?

3. While swimming, the swimmer pushes the water……………………., and the water pushes the swimmer …………………….. And makes the swimmer move forwards.

4. Recoil of gun is an example of Newton’s ……………........  Law of motion.

5. ……………………of a body is defined as the product of its mass and velocity.

6. SI unit of …………………………..  Is kilogram meter per second?

7. The law of conservation of linear momentum is deduced from Newton’s …………………………  law of motion.

8. In collisions and explosions, the total …………………. remains unchanged, provided that there is no external   ……………………..acting.

9. A ball set rolling on the ground stops after sometime. This is due to unbalanced force of ………………………..  Between the ball and the ground.

10. A small car and a large truck have a head-on collision. Both the vehicles have………………………   change in momentum.

CBSE Class 9 Physics Fill In The Blanks for Gravitation.

1. The buoyant force on an object due to a liquid arises on account of  …………… difference between the lower and upper parts of the immersed object.

2. Every object in the universe attracts every other object with a force which is directly proportional to the product of their ………….. And inversely proportional to the square of the ………….. Between them.

3. When a body is wholly or partially immersed in a liquid, it experiences an up thrust which equal to the …………… of liquid displaced.

4. The ratio of buoyant forces experienced by a solid body when immersed in two liquids whose relative densities are 1 and 0.5 respectively is …………...

5. The value of acceleration due to gravity does not depend upon the. Of the body.

6. The magnitude of buoyant force acting on an object immersed in a liquid depends upon the ……………. of the liquid displaced and the ……………… of the liquid.

7. An object having density greater than that of a liquid …………..  In it while an object having density smaller than that of the liquid …………….. On it.

8. The upward force acting on an object immersed in a liquid is called ……………. force.

9. When a body is partially or completely immersed in a fluid at rest, it experiences …………. which is equal to the weight of the fluid displaced by it.

10. The value of acceleration due to gravity (g) ……………… as we move above the surface of Earth or go inside the surface of Earth.

CBSE Class 9 Physics Fill In The Blanks for Work and Energy.

1. Gravitational potential energy is due to the force of attraction between the …………… and the object.

2. ……………..  Is the rate at which work is done or energy is consumed?

3. According to the law of conservation of energy, the total energy of the universe remains …………

4. If the velocity of a body is tripled, then the KE of the body becomes …………. times that of its initial value.

5. Energy due the motion is called …………….

6. Mass of a body moving with speed of 10 m/s & kinetic energy of 100 J is …………….

7. Work done to stop a trolley of mass 10 kg moving with speed of 10 m/s is ……………..

8. The amount of energy possessed by a body is equal to the total quantity of ……………. it can do.

CBSE Class 9 Physics Fill In The Blanks for Sound.

1. The sounds of frequencies higher than 20 kHz are called ……………. sounds.

2. The phenomenon of persistence of audible sound after the source has stopped emitting sound is called ………………...

3. The audible range of hearing in humans is in the frequency range of …………… Hz to …………. kHz.

4. ……………of a sound wave is equal to the distance travelled by it in its periodic time.

5. Sound is a   wave and it travels through …………….. .

6. Sound waves cannot travel in ………………. .

7. Sound waves are ……………… waves.

8. The distance between 1st crest and 7th trough of a transverse wave of wavelength 20 cm is ……………….

9. A material medium is necessary for the ……………. of sound.

10. The repetition of sound of a source by reflection from an obstacle is called …………….

CBSE Class 9 Chemistry Fill In The Blanks for Atoms and Molecules.

1. One nm is equal to ………………

2. According to Law of conservation of mass, mass in …………. system will remain constant.

3. The valence of hydrogen in Ammonia (NH3) is   …………..

4. The number of atoms in a molecule is called it’s   …………….

5. The anion of an element has more ………….. Than the normal atom.

6. The number of atoms of each element in a given compound is …………….

7. The valence of bromide ion is …………….

8. Indivisibility of atom was proposed by   …………..

9. The number of atoms present in 12g of C-12 isotope i.e., 6.023×1023 atoms is ……………. number.

10. Hydrogen molecule exists as   ………………..

CBSE Class 9 Chemistry Fill in the Blanks for Structure of the Atom

1. The mass of proton is equal to that of another subatomic particle present in an atom called   .

2. …………… electrons are located in the outermost shell of an atom.

3. A systematic distribution of electron in various energy level of an atom of an element is known as it’s ………………. .

4. ……………. Most of the α-particles pass straight through the gold foil showing that most of the space in the atom is   ……………

5. A α-particle consists of doubly - charged …………….. Ions.

6. An atom contains positively charged particles at the   …………….

7. Canal rays are attracted towards …………… electrode.

8. The   in an atom is dense, small in size and is positively charged.

9. Nucleus of an atom is ……………… charged.

10. According to Bohr's model of an atom while revolving in discrete orbits, the electrons   energy.

CBSE Class 9 Biology Fill In The Blanks for Diversity in Living Organisms.

1. In Thallophyta, sex organs are simple and ………………. celled.

2. Bilateral symmetry, triploblastic and true body cavity are the characteristic features of members of Phylum ………………

3. The notochord is replaced by …………… in higher vertebrates.

4. Members of Class …………… are able to live on both, land and water.

5. Endosperm has …………… cells in Angiosperms.

6. Corals belong to Phylum ……………

7. Association between blue-green algae and fungi is called as …………..

8. ……………… are called the amphibians of the plant kingdom.

9. Members of Class …………..  Are not cold-blooded.

10. …………..  Is a coelomate without a notochord?

CBSE Class 9 Biology Fill In The Blanks for Why Do We Fall Ill?

1. ………………   is an impairment of the normal state of a living organism that disturbs or modifies the performance of vital functions of the body.

2. The disease causing factors which exist within the human body are called ………………. factors.

3. The symptoms are usually a result of ……………..

4. A doctor is able to diagnose disease by identifying the ……………….

5. Dengue is a   disease.

6. For a…………….. good health means being able to stretch his body into difficult, but graceful positions.

7. Infectious diseases are caused by ……………….

8. ……………   is the disease of liver.

9. Disease-causing microorganisms are called ………………..

10. Antibiotics commonly block biochemical pathways important for the growth of ……………..

CBSE Class 9 Biology Fill In The Blanks for Natural Resources.

1. The process which reduce nitrates back to nitrogen is called …………...

2. …………… are absorbed by plants into their system and used for making organic matter.

3. ……………..  Acts as the source of nitrogen for plants.

4. ……………   indicates the quality of water.

5. Atmosphere of Mars is rich in.

6. ……………..   Is a nitrifying bacteria.

7. Earthworms are ………… which are involved in paedogenesis.

8. Atmosphere of Earth is rich in ………………..

9. ..................A small portion of soil water is chemically bound with soil materials and is known as.

10. CFCs are carbon compounds having both ………… and chlorine.

CBSE Class 9 Biology Fill In The Blanks for Improvement in Food Resources.

1. Blast is a …………… disease of paddy.

2. Crossing between two different species of the same genus is called ……………. cross-breeding.

3. The practice of growing different crops on a piece of land in a pre-planned succession is known as ……………..

4.  ………………..  Is a method of obtaining fish from fish farming?

5. Aseel is a popular breed of …………..

6. Vermicomposting is a type of manure made by ……………….. And microorganisms.

7. Rabies is a ……………….. Disease.

8. Organic chemicals which are added to soil of crop field to improve its physical conditions are called ……………….

9. Aluminum phosphate is a ………………. fumigant.

10. Kasturi is the variety of  ……………….