Half Yearly Class 9 Science Set 1 | 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 process by which a solid changes directly into a gas is called:  (1 Mark) 
(a) Melting
(b)  Sublimation
(c)  Evaporation
(d) Condensation

Q2.  Which of the following is a physical change?  (1 Mark) 
(a) Burning of coal
(b) Rusting of iron
(c) Boiling of water
(d) Digestion of food

Q3.  The smallest unit of life that can perform all life processes is:  (1 Mark) 
(a) Tissue
(b) Organ
(c) Cell
(d) Organelle

Q4.  Which tissue provides mechanical support to plants?  (1 Mark) 
(a) Parenchyma
(b) Collenchyma
(c) Sclerenchyma
(d) Xylem

Q5. An object moving with uniform velocity has:  (1 Mark) 
(a) Zero acceleration
(b) Constant acceleration
(c) Variable acceleration
(d) Negative acceleration

Q6. The SI unit of force is:  (1 Mark) 
(a) Joule
(b) Newton
(c) Watt
(d) Pascal

Q7. Which of the following is a mixture?  (1 Mark) 
(a) Distilled water
(b)  Salt solution
(c) Carbon dioxide
(d) Sugar

Q8. The plasma membrane is:  (1 Mark) 
(a) Fully permeable
(b)  Impermeable
(c)  Selectively permeable
(d)  Rigid

Q9. Which of the following measures the shortest path covered by an object?  (1 Mark) 
(a) Speed
(b) Distance
(c) Displacement
(d) Time

Q10.  The third law of motion states that:  (1 Mark) 
(a) An object remains at rest unless acted upon
(b) Acceleration is proportional to force
(c) For every action, there is an equal and opposite reaction
(d) Force equals mass times acceleration

Q11. Assertion (A): Evaporation causes cooling.  (1 Mark) 
Reason (R): Particles with higher kinetic energy leave the liquid surface during evaporation. 
(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 solution is a homogeneous mixture.   (1 Mark) 
Reason (R): The components of a solution cannot be separated by filtration. 
(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): Mitochondria are called the powerhouse of the cell.   (1 Mark) 
Reason (R): They produce energy in the form of ATP through cellular respiration. 
(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): Blood is a connective tissue.   (1 Mark) 
Reason (R): It connects different parts of the body by transporting nutrients and oxygen. 
(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): An object can have zero displacement even after moving.   (1 Mark) 
Reason (R): Displacement depends on the initial and final position of the object. 
(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): Inertia depends on the mass of an object.   (1 Mark) 
Reason (R): A heavier object requires more force to change its state of 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.

Q17. Which of the following is a chemical change?   (1 Mark) 
(a) Melting of ice
(b) Burning of paper
(c) Cutting of wood
(d) Dissolving sugar in water

Q18. The function of the vacuole in a plant cell is to:   (1 Mark) 
(a) Synthesize proteins
(b) Store nutrients and waste
(c) Produce energy
(d) Control cell division

Q19. A car accelerates uniformly from rest to 20 m/s in 5 seconds. Its acceleration is:   (1 Mark) 
(a) 2 m/s²
(b) 4 m/s²
(c) 5 m/s²
(d) 10 m/s²

Q20. The process used to separate cream from milk is:   (1 Mark) 
(a) Filtration
(b) Centrifugation
(c) Distillation
(d) Chromatography

Section B

Q1. Define latent heat of fusion.  (2Marks) 

Q2.  Differentiate between a mixture and a compound (any two points).  (2 Marks) 

Q3. Name two cell organelles that contain their own DNA.  (2 Marks) 

Q4.  What is the function of xylem in plants?  (2 Marks) 

Q5. Define uniform motion with an example.  (2 Marks) 

Q6.  State Newton’s second law of motion  (2 Marks) 

Q7. What is evaporation? What are the factors affecting it?  (2 Marks) 

Section C

Q1. Explain the process of evaporation and list two factors affecting it.  (3 Marks) 

Q2.  Describe the process of separating a mixture of sand and salt.  (3 Marks) 

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

Q4. Differentiate between meristematic and permanent tissues in plants (three points).  (3 Marks) 

Q5. Derive the second equation of motion: s = ut + 1/2 at².   (3 Marks) 

Q6. Explain Newton’s first law of motion with an example.  (3 Marks) 

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

Section D

Q1. (a)  Explain the process of boiling and how it differs from evaporation. (3 Marks) 
(b)  Why does the temperature remain constant during the change of state?  (2 Marks) 

Q2. (a)  Describe the structure and functions of the nucleus in a cell. (3 Marks) 
(b)  Differentiate between plant and animal cells (any four points). (2 Marks)

Q3.  (Internal Choice)
Option 1: 
(a) Derive the third equation of motion: v²  = u² + 2as. (3 Marks) 
(b) A car starts from rest and accelerates at 2 m/s² for 10 seconds. Calculate the final velocity and distance covered. (2 Marks)

Option 2: (a) Explain Newton’s third law of motion with two examples. (3 Marks) 
(b) A force of 50 N acts on a body of mass 10 kg initially at rest. Calculate the acceleration and the distance covered in 5 seconds. ( 2 Marks)

Q4. Grass looks green, papaya appears yellow. Which cell organelle is responsible for this? (5 marks)

Q5. i. What factors affect the solubility of solvent and solute?  (5Marks) 
ii. State the differences between compounds and mixtures  (5Marks) 

You can access the solutions to this Half Yearly here.