Class 9 Half yearly science paper

                                                    Physics 

Multiple choice questions.

1. Which of the following is a vector quantity?

 (a) Speed

 (b) Time

 (c) Distance 

 (d) Displacement 

2. The SI unit of force is:

 (a) Kg

 (b) m/s

 (c) Newton

 (d) Joule

3. The body is said to be uniform motion is:

 (a) It covers equal distance in equal intervals of time

 (b) Its speed keeps changing 

 (c) It remains at rest

 (d) None of these 

4. Which of the motion explain why a person falls backward when a bus suddenly moves forward?

 (a) First law

 (b) Second law

 (c) Third law

 (d) Law of gravitation 

Short answer type questions.

5. Define acceleration. Give its SI unit.

6. States Newton's third law of motion with one suitable example.

7. Differentiate between scalar and vector quantity with two examples each.

8. Explain why passengers tend to move forward when a moving bus suddenly stops.

9. Write any three difference between distance and displacement with examples.

Long answer and numerical questions.

10. A train starting from rest accelerated uniformly at 0.2 m/s2 for 5 minutes. Find (i) the velocity acquired, (ii) the distance travelled.

11. Derive the first and second equation of motion using the graphical method.

12. A cricket ball of mass 200g moving with a velocity of 20 m/s is stopped by a Player in 0.05s. Find the fore applied by a player.

13. A car of mass 1500kg moving with a velocity of 20 m/s is brought to rest by applying brakes in 10 seconds. Find (i) the retardation produced, (ii) the force applied by brakes.

14. A stone is thrown vertically upward with a velocity of 25 m/s. Find (i) the maximum height reached, (ii) the time taken to reach the maximum height, (iii) the total time of flight. (Take g=9.8m/s2)

15. A bullet of mass 20 g is moving with a velocity of 300 m/s. It gets embedded in a wooden block of mass 1 kg kept at rest. Find the common velocity of the system after collision using the law of conservation of momentum.

                                             Chemistry 

1. The direct conversion of vapour into solid on cooling is called 

(a) Evaporation 

(b) Solidification 

(c) Deposition 

(d) Condensation 

2. If the temperature of an object is 268K. It will be equivalence to

(a) -5°C

(b) 5°C

(c) 368°C

(d) 25°C

3. When heat is constantly supplied by a burner to boiling water. Then temperature of water during evaporation.

(a) Rises very slowly 

(b) Rises rapidly until steam is produced 

(c) First rises and then becomes constant 

(d) Does not rises at all

4. Which of the following is not mixture?

(a) Kerosene

(b) Air

(c) Alcohol

(d) Petrol

5. "Is malleable and ductile" best describes.

(a) Solution 

(b) A metal

(c) A compound 

(d) A non-metal

6. The boiling point of water is 100°C. Express the SI units (kelvin scale).

7. Name one common substance which can be changed from one another by heating or cooling.

8. Define the term "latent heat of vaporization" of a liquid.

9. What is sublimation? Name any two sublimate.

10. Write any three characteristics of metal.

11. What is compound? Write any two compound.

12. What is alloys? Give any suitable example of alloy.

13. Write a short note on following topic:

(i) Suspension.  

(ii) Homogeneous mixture 

(iii) Tyndall effect 

14. If 2 ml of accetone is present in 45 ml of its aqueous solution. Calculate concentration of this solution.

                                                 Biology 

Multiple choice questions.

1. Osmosis is the movement of:

(a) Solute particles from higher to lower concentrations 

(b) Water molecules across a semi permeable membrane from higher to lower concentrations of water

(c) Gases through a permeable membrane 

(d) Lons against the concentration gradient 

2. Micronutrients required by plants include:

(a) Iron, manganese and zinc

(b) Nitrogen, phosphorus and potassium 

(c) Boron, chlorine and molybdenum 

(d) Copper, nickel and silicon

3. Inter cropping involves:

(a) Growing two or more crops simultaneously on the same field in a definite pattern

(b) Growing crops in sequence on the same field 

(c) Growing a single crop over a large area

(d) Using genetically modified seeds only

4. Thr green revolution in India primarily focused in increasing the production of:

(a) Fruits and vegetables 

(b) Cereals like wheat and rice

(c) Pulses and oilseeds

(d) Milk and eggs

5. The cell wall in plant cells is made up of:

(a) Cellulose

(b) Peptidoglycon

(c) Chitin

(d) Lignin

6. The nucleus controls:

(a) Only cell division

(b) Only respiration 

(c) All cellular activities and heredity

(d) Photosynthesis 

7. Which of the following is not a method to improve crop yield?

(a) Crop variety improvement 

(b) Crop production management 

(c) Crop protection management 

(d) Soil erosion 

Very short type questions.

1. Define diffusion.

2. Name one abiotic factor that affects crop production and how 

3. What is the function of cell wall in plants cell?

4. Define kharid crop. Give one example of a kharif crop.

Short answer type questions.

1. What are the advantages of using manures over fertilizers?

2. Explain the importance of irrigation in crop production.

3. Describe mixed cropping and its benefits.

4. Differentiate between prokaryotic and eukaryotic cells with three points.

5. Write the function of lysosomes.

Long answer type questions.

1. With the help of the flow chart, list all the cell organelles and write one function of each of them.

2. Differentiate between manures and fertilizers.

Case based questions.

1. What is kharif season period?

(a) June to September 

(b) July to January 

(c) June to October 

(d) April to December 

2. What is rabi season period?

(a) November to April 

(b) November to June

(c) October to June

(d) January to July

3. Plants manufacturer their food in sunlight by the process called 

(a) Photo period 

(b) Photosynthesis 

(c) Photolysis 

(d) None of these

4. Which of the following is not a kharif crop?

(a) Paddy

(b) Maize

(c) Linseed

(d) Pigeon pea

5. Which of the following is not a rani crop?

(a) Wheat

(b) Soyabean 

(c) Peas 

(d) Mustard 






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