Half Yearly Class 9 Science Set 2 | Science Class 9 PDF Download

Time: 3 Hours
Maximum Marks: 80
General Instructions:
(i) The question paper comprises four sections: A, B, C, and D. 
(ii) All questions are compulsory. However, internal choices are provided in some questions. 
(iii) Section A consists of 20 objective type questions (MCQs/Assertion-Reason) carrying 1 mark each. 
(iv) Section B consists of 7 very short answer questions carrying 2 marks each. 
(v) Section C consists of 7 short answer questions carrying 3 marks each. 
(vi) Section D consists of 5 long answer questions carrying 5 marks each. 
(vii) Draw neat and labelled diagrams wherever necessary

Section A

Q1. The temperature at which a liquid starts boiling is called:  (1 Mark)
(a) Melting point
(b) Boiling point
(c) Freezing point
(d) Sublimation point 

Q2. Which of the following is a pure substance?   (1 Mark)
(a) Air
(b) Sugar syrup
(c) Sodium chloride
(d) Milk 

Q3. The organelle responsible for protein synthesis in a cell is:   (1 Mark)
(a) Ribosome
(b) Lysosome 
(c) Golgi apparatus
(d) Endoplasmic reticulum 

Q4. Which animal tissue is responsible for movement?  (1 Mark)
(a) Epithelial
(b) Connective
(c) Muscular
(d) Nervous 

Q5. The rate of change of velocity is called:   (1 Mark)
(a) Speed
(b) Acceleration
(c) Distance
(d) Momentum 

Q6. The property of an object to resist a change in its state of motion is called:   (1 Mark)
(a) Force
(b) Inertia
(c) Friction
(d) Impulse 

Q7. A true solution will:   (1 Mark)
(a) Scatter light
(b) Settle down over time
(c) Not scatter light
(d) Be opaque 

Q8. The function of lysosomes in a cell is to:   (1 Mark)
(a) Store genetic material 
(b) Digest waste materials 
(c) Produce energy
(d) Transport proteins 

Q9. Which of the following depends on direction?   (1 Mark)
(a) Speed
(b) Distance 
(c) Velocity
(d) Time 

Q10. The momentum of an object is the product of its:   (1 Mark)
(a) Mass and acceleration 
(b) Mass and velocity
(c) Force and time
(d) Force and distance

Q11. Assertion (A): The particles of a gas have maximum kinetic energy.   (1 Mark)
Reason (R): Gas particles move freely in all directions with high speed. 
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true. 

Q12. Assertion (A): A suspension is a heterogeneous mixture.   (1 Mark)
Reason (R): The particles of a suspension can be seen with the naked eye. 
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true. 

Q13. Assertion (A): The endoplasmic reticulum is involved in protein synthesis.   (1 Mark)
Reason (R): Rough endoplasmic reticulum has ribosomes attached to its surface. 
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true. 

Q14. Assertion (A): Cartilage is a connective tissue.   (1 Mark)
Reason (R): It provides support and flexibility to body parts. 
(a) Both A and R are true, and R is the correct explanation of A. 
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true. 

Q15. Assertion (A): A body moving in a circular path with constant speed has accel- eration.  (1 Mark)
Reason (R): The direction of velocity changes continuously in circular motion. 
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.

Q16. Assertion (A): Momentum is conserved in an isolated system.   (1 Mark)
Reason (R): No external force acts on an isolated system. 
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true. 

Q17. Which of the following is not a characteristic of a compound?   (1 Mark)
(a) Fixed composition
(b) Chemically combined
(c) Variable composition
(d) Definite properties 

Q18. The organelle that helps in cell division in animal cells is:   (1 Mark)
(a) Centriole
(b) Nucleus
(c) Vacuole
(d) Chloroplast 

Q19. An object moves with a uniform acceleration of 3 m/s² for 6 seconds, starting from rest. The final velocity is:   (1 Mark)
(a) 12 m/s
(b) 15 m/s
(c) 18 m/s
(d) 21 m/s 

Q20. The method used to separate two miscible liquids with different boiling points is:   (1 Mark)
(a) Filtration
(b) Distillation
(c) Centrifugation
(d) Evaporation

Section B

Q1. Define diffusion with an example.  (2 Marks) 

Q2.  What is a homogeneous mixture? Give one example.  (2 Marks) 

Q3. Name two types of epithelial tissues.  (2 Marks) 

Q4.  What is the role of phloem in plants?  (2 Marks) 

Q5. Define displacement with an example.  (2 Marks) 

Q6. State the law of conservation of momentum.  (2 Marks) 

Q7. Explain how sound is produced by your school bell.   (2 Marks) 

Section C

Q1. Explain the effect of pressure on the boiling point of a liquid.  (3 Marks) 

Q2.  Describe the process of separating a mixture of iron filings and sulphur powder.  (3 Marks) 

Q3. Draw a labelled diagram of an animal cell.  (3 Marks) 

Q4. Differentiate between parenchyma and collenchyma tissues in plants (three points).  (3 Marks) 

Q5. Derive the first equation of motion: v = u + at.  (3 Marks) 

Q6. Explain the concept of inertia with an example.  (3 Marks) 

Q7. (Internal Choice)  (3 Marks) 
Option 1: What is a suspension? Give two examples and one property. 
Option 2: Describe the process of fractional distillation with an example.

Section D

Q1. (a) Explain the process of melting and factors affecting it. (3 marks) 
(b) Why does evaporation increase with an increase in surface area? (2 marks) 

Q2. (a) Describe the structure and functions of the Golgi apparatus in a cell. (3 marks) 
(b) Differentiate between smooth and rough endoplasmic reticulum (any four points). (2 marks) 

Q3. (Internal Choice) 
Option 1: 
(a) Explain Newton’s second law of motion and derive F = ma. (3 marks) 
(b) A body of mass 5 kg is acted upon by a force of 20 N. Calculate the acceleration and velocity after 4 seconds if it starts from rest. (2 marks) 

Option 2: 
(a) Explain Newton’s first law of motion with two examples. (3 marks) 
(b) A force of 30 N acts on a body of mass 6 kg initially at rest. Calculate the acceleration and distance covered in 3 seconds. (2 marks)

Q4. An electron is regarded as a universal particle. Explain

​Q5. Describe the types of connective tissues along with their functions.

​You can access the solutions to this Half Yearly here.