CBSE Class 9 Science Practice Paper 3 (2026-27)

A full-length Class 9 Science practice paper in the CBSE 2026-27 pattern, with its answer key. Free to read and to save as a PDF.

Time: 3 hours | Maximum Marks: 80

General Instructions

1. This question paper consists of three sections: Section A, Section B and Section C.

2. All questions are compulsory.

3. Section A has 16 questions.

4. Section B has 13 questions.

5. Section C has 10 questions.

6. Internal choices are given in some questions, as indicated.

ABIOLOGY

Which of the following describes the fundamental unit of life?(a) Tissue(b) Organelle(c) Cell(d) Molecule

The tissue responsible for the transport of prepared food from the leaves to other parts of the plant is:(a) Xylem(b) Phloem(c) Epidermis(d) Cambium

Which of the following is a characteristic feature of animal cells?(a) Presence of a cell wall(b) Presence of chloroplasts(c) Presence of a large central vacuole(d) Absence of a cell wall

The process by which new individuals are produced from pre-existing individuals of the same species is called:(a) Digestion(b) Respiration(c) Excretion(d) Reproduction

Which of the following is NOT a method of asexual reproduction in plants?(a) Cutting(b) Grafting(c) Pollination(d) Budding

The organisms that produce their own food are called:(a) Heterotrophs(b) Autotrophs(c) Decomposers(d) Consumers

Which of the following is a component of the biosphere?(a) Rocks(b) Water bodies(c) Living organisms(d) Atmosphere

Assertion (A): In plants, intercalary meristems help in the regeneration of parts cut off by herbivores.Reason (R): Intercalary meristems are located at the nodes of the stem.(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.

Assertion (A): Sexual reproduction involves the fusion of male and female gametes.Reason (R): Sexual reproduction leads to offspring that are genetically identical to the parents.(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.

What is the role of stomata in plants?

Differentiate between prokaryotic and eukaryotic cells.

Explain the process of double fertilisation in flowering plants.

A scientist is observing a unicellular organism that lacks a nucleus and membrane-bound organelles but has ribosomes.(a) To which kingdom does this organism most likely belong?(b) What is a key characteristic that distinguishes this organism from a plant cell?

What is vegetative propagation? Give two examples of plants propagated vegetatively.

Case Study: The Earth's atmosphere plays a crucial role in regulating temperature through the greenhouse effect. Certain gases trap heat, preventing it from escaping into space.(a) Name two greenhouse gases.(b) How does the increase in the concentration of these gases affect the Earth's temperature?(c) Which sphere of the Earth is primarily responsible for absorbing solar radiation and thus influencing atmospheric temperature?

Long Answer: Describe the process of mitosis and explain its significance in living organisms.ORExplain the structure and functions of the different types of blood cells.

BCHEMISTRY

Which of the following is a homogeneous mixture?(a) Soil(b) Air(c) Mud(d) Lemonade

The chemical symbol for Iron is:(a) Ir(b) Fe(c) In(d) Io

The law that states that in a chemical reaction, elements combine in a simple whole number ratio of atoms is:(a) Law of Conservation of Mass(b) Law of Definite Proportions(c) Dalton's Atomic Theory(d) Law of Multiple Proportions

What are the main differences between ionic and covalent compounds in terms of their properties?

Explain the concept of valency with examples.

Describe the steps involved in separating a mixture of sand and water using filtration.

Case Study: A student is investigating the properties of different types of matter. They observe a substance that conducts electricity in the molten state but not in the solid state. It has a high melting point and forms ions when dissolved in water.(a) What type of substance is this most likely to be?(b) Explain why it conducts electricity in the molten state but not in the solid state.(c) Name a common example of such a substance.(d) What is the term used to describe the smallest electrically neutral unit of such a substance?

Long Answer:(a) State and explain the Law of Conservation of Mass with an example. (3 marks)(b) Write the chemical formula for potassium nitrate and aluminium sulphate. (2 marks)OR(a) Describe the structure of an atom according to Rutherford's model. (2 marks)(b) What are isotopes? Give two examples of isotopes and explain why they have similar chemical properties. 3marks

CPHYSICS

When a body moves in a circular path, the motion is:(a) Uniform linear motion(b) Non-uniform linear motion(c) Uniform circular motion(d) Accelerated linear motion

A force of 50 N is applied to an object of mass 10 kg. The acceleration produced is:(a) 5 m/s²(b) 0.2 m/s²(c) 500 m/s²(d) 40 m/s²

Assertion (A): Sound travels faster in solids than in gases.Reason (R): The density of solids is generally higher than that of gases.(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.

Define acceleration and write its SI unit.

A car is moving with a velocity of 36 km/h. The driver applies the brakes and the car stops in 5 seconds. Calculate the acceleration of the car.

Explain the difference between distance and displacement. Under what condition is the magnitude of displacement equal to the distance travelled?

A tuning fork of frequency 480 Hz produces sound waves in air. Calculate the wavelength of these waves, if the speed of sound in air is 340 m/s.

Case Study: A student is pushing a heavy box across a rough floor.(a) Identify the main forces acting on the box when it is being pushed horizontally.(b) Explain the role of friction in this scenario.(c) If the student stops pushing, what happens to the box and why?(d) How would the force of friction change if the surface was smoother?

Long Answer:(a) State Newton's second law of motion. Explain the relationship between force, mass, and acceleration. (3 marks)(b) A motorcar is moving with a velocity of 108 km/h. How much distance will it cover before coming to rest if the brakes provide a constant deceleration of 6 m/s²? (2 marks)OR(a) Describe the characteristics of sound waves, including amplitude, frequency, and wavelength. (3 marks)(b) A person shouts in a valley and hears an echo after 3 seconds. If the speed of sound in air is 330 m/s, what is the distance of the person from the valley wall? 2marks

Answer Key

ABIOLOGY

(b) Phloem

(d) Absence of a cell wall

(d) Reproduction

(b) Autotrophs

(c) A is true, but R is false. (Intercalary meristems are at nodes, but regeneration is due to them being at the base of internodes or leaf blades).

(a) Both A and R are true, and R is the correct explanation of A.

Stomata are pores on the leaf surface that regulate gas exchange (carbon dioxide intake and oxygen release) and transpiration.

Prokaryotic cells lack a membrane-bound nucleus and other membrane-bound organelles. Eukaryotic cells have a well-defined nucleus and membrane-bound organelles.

Double fertilisation involves the fusion of one male gamete with the egg to form the zygote, and the fusion of the second male gamete with the polar nuclei to form the primary endosperm nucleus.

(a) Monera (b) Presence of a nucleus and membrane-bound organelles.

Vegetative propagation is a mode of asexual reproduction in plants where new plants are produced from vegetative parts like stems, roots, or leaves. Examples: Potato (from tubers), Ginger (from rhizomes), Bryophyllum (from leaves).

(a) Carbon dioxide (

C O_{2}

), Methane (

C H_{4}

).(b) It leads to global warming and an increase in Earth's average temperature.(c) The Atmosphere (specifically, the interaction with greenhouse gases).

Mitosis: Description of stages (prophase, metaphase, anaphase, telophase) and significance (growth, repair, asexual reproduction). OR Blood cells: Red blood cells (oxygen transport), White blood cells (immunity), Platelets (clotting).

BCHEMISTRY

(d) Lemonade (A solution is homogeneous)

(b) Fe

(b) Law of Definite Proportions

Ionic compounds: High melting/boiling points, conduct electricity when molten or dissolved, soluble in polar solvents. Covalent compounds: Low melting/boiling points, do not conduct electricity, soluble in non-polar solvents.

Valency is the combining capacity of an atom, determined by the number of electrons gained, lost, or shared to achieve a stable electron configuration. Example: Sodium (Na) has valency 1 (loses 1 electron); Chlorine (Cl) has valency 1 (gains 1 electron); Oxygen (O) has valency 2 (gains 2 electrons).

Filtration: Steps: 1. Mix sand and water. 2. Pour the mixture into a filter paper in a funnel. 3. Sand is retained on the filter paper, while water passes through as filtrate.(c) Insolubility of sand in water.(d) Solid (dissolved in water, but can be recovered).

(a) Law of Conservation of Mass: In a chemical reaction, mass is neither created nor destroyed. Example:

2 H_{2} + O_{2} \to 2 H_{2} O

. Mass of reactants = Mass of products.(b) Potassium nitrate:

K N O_{3}

. Aluminium sulphate:

A l_{2} (S O_{4})_{3}

.OR(a) Rutherford's model: Atom has a central, positively charged nucleus containing most of the mass. Electrons revolve around the nucleus in specific orbits. Most of the atom is empty space.(b) Isotopes are atoms of the same element with the same atomic number (number of protons) but different mass numbers (due to different number of neutrons). Example: Hydrogen isotopes - Protium (

_{1}^{1} H

), Deuterium (

_{1}^{2} H

), Tritium (

_{1}^{3} H

). They have similar chemical properties because they have the same number of valence electrons.

CPHYSICS

(a) 5 m/s²

(a) Both A and R are true, and R is the correct explanation of A.

Acceleration is the rate of change of velocity. SI unit: m/s².

Initial velocity,

u = 36 km/h = 36 \times \frac{5}{18} m/s = 20 m/s

. Final velocity,

v = 0 m/s

. Time,

t = 5 s

a = \frac{v - u}{t} = \frac{0 - 20}{5} = - 4 {m/s}^{2}

Distance is the total path length covered by an object. Displacement is the shortest distance between the initial and final positions, with direction. They are equal when the object moves in a straight line without changing direction.

Frequency,

ν = 480 Hz

. Speed of sound,

v = 340 m/s

. Wavelength,

λ = \frac{v}{ν} = \frac{340}{480} \approx 0.71 m

(a) Applied force, force of friction, gravitational force (weight), and normal force.(b) Friction opposes the motion of the box, making it harder to push.(c) If the student stops pushing and friction is present, the box will eventually come to rest due to the opposing force of friction.(d) The force of friction would be less on a smoother surface.

(a) Newton's second law: The rate of change of momentum of an object is directly proportional to the applied force and takes place in the direction of the force. Mathematically,

F = m a

. This means acceleration is directly proportional to force and inversely proportional to mass (

a \propto \frac{F}{m}

).(b)

u = 108 km/h = 108 \times \frac{5}{18} = 30 m/s

v = 0 m/s

a = - 6 {m/s}^{2}

. Using

v^{2} = u^{2} + 2 a s

0^{2} = (30)^{2} + 2 (- 6) s

0 = 900 - 12 s

12 s = 900

s = \frac{900}{12} = 75 m

.OR(a) Characteristics of sound waves: Amplitude (maximum displacement from mean position, related to loudness), Frequency (number of oscillations per second, related to pitch), Wavelength (distance between two consecutive compressions or rarefactions, related to speed and frequency).(b) Speed of sound,

v = 330 m/s

. Time taken for echo to return,

t = 3 s

. Total distance travelled by sound (to valley and back) =

v \times t = 330 \times 3 = 990 m

. Distance of the person from the valley wall =

\frac{Total distance}{2} = \frac{990}{2} = 495 m

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Class 9 Science — Practice Paper 3

Answer Key