Class 9th Physical & Biological Science SelfAssessment 1 question paper 2025-26

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Table of Contents

Class 9th Physical Science Self-Assessment Model Paper – I

(2025-26)
Time: 1 hour
Maximum Marks: 35

Part – A (Multiple Choice Questions – MCQ)

(Each question carries 1 mark)

Which of the following is a property of solids?
a) No fixed shape
b) Fixed shape and fixed volume
c) Takes the shape of the container
d) Flow freely
What is the SI unit of force?
a) Newton
b) Joule
c) Watt
d) Pascal
The pressure exerted by a liquid in a container is:
a) Constant at all points
b) Inversely proportional to the depth
c) Directly proportional to the depth
d) Independent of the depth
Which of the following is an example of a physical change?
a) Burning of paper
b) Rusting of iron
c) Melting of ice
d) Digesting food
What is the formula for calculating density?
a) Density = Mass/Volume
b) Density = Mass × Volume
c) Density = Force × Area
d) Density = Pressure × Volume
Which of the following is true about gases?
a) Gases have a definite volume but no definite shape.
b) Gases have neither a definite shape nor a definite volume.
c) Gases have a definite shape but no definite volume.
d) Gases have both a definite shape and volume.
Which of these properties increases with temperature in gases?
a) Density
b) Pressure
c) Volume
d) Weight
Which of the following is an example of a chemical change?
a) Freezing water
b) Dissolving salt in water
c) Burning wood
d) Melting wax
The density of a substance is defined as:
a) The amount of mass in a given volume
b) The amount of pressure exerted in a substance
c) The amount of temperature in a substance
d) The force per unit area
In the equation $F = ma$, what does ‘a’ represent?
a) Acceleration
b) Area
c) Angle
d) Amount

Part – B (Very Short Answer Questions – VSAQ)

(Each question carries 2 marks)

Define pressure and give its SI unit.
What is the difference between physical and chemical changes?
State Archimedes’ principle.

Part – C (Short Answer Questions – SAQ)

(Each question carries 4 marks)

Explain the relationship between force, mass, and acceleration in Newton’s Second Law of Motion.
Calculate the pressure exerted by a force of 100 N on an area of 2 m².
Describe the properties of liquids with examples.

Part – D (Long Answer Question – Essay)

(1 question – 8 marks)

Discuss the properties of matter in detail. Explain how the three states of matter—solid, liquid, and gas—differ in terms of shape, volume, and particle arrangement. Include examples in your answer.

Answer Key

Part – A (MCQ):

b) Fixed shape and fixed volume
a) Newton
c) Directly proportional to the depth
c) Melting of ice
a) Density = Mass/Volume
b) Gases have neither a definite shape nor a definite volume.
b) Pressure
c) Burning wood
a) The amount of mass in a given volume
a) Acceleration

Part – B (VSAQ):

Pressure is defined as force per unit area. Its SI unit is Pascal (Pa).
Physical changes are those that do not alter the chemical composition of the substance, like freezing water. Chemical changes result in the formation of new substances, like burning wood.
Archimedes’ principle states that an object submerged in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced by the object.

Part – C (SAQ):

Newton’s Second Law states that the force applied on an object is directly proportional to its mass and the acceleration it produces. Formula: $F = ma$. If mass increases, the force needed to accelerate the object increases, and if acceleration increases, the force also increases.
Pressure $P = \frac{F}{A} = \frac{100 \, \text{N}}{2 \, \text{m}^2} = 50 \, \text{Pa}$.
Liquids have a fixed volume but no fixed shape, taking the shape of their container. For example, water in a bottle takes the shape of the bottle but remains at a constant volume.

Part – D (Essay):

Solid: Solids have a fixed shape and volume because their particles are tightly packed and vibrate in place. Example: Ice cube.
Liquid: Liquids have a fixed volume but no fixed shape, as their particles are loosely packed and move around each other. Example: Water.
Gas: Gases have neither a fixed shape nor a fixed volume. The particles are far apart and move freely. Example: Oxygen in the air.

Ah, I see! You want a Class 9 Biological Science Self-Assessment Question Paper based on the syllabus you shared, specifically focusing on topics related to Biology (e.g., Cell Structure, Life Processes, etc.) for the 2025-2026 academic year.

Here’s a question paper based on those topics:

Class 9 – Biological Science Self-Assessment question Paper – I