CBSE Class 10 Science Sample Paper 2025 – PDF with Solutions & Exam Tips

🔍 Introduction:

Preparing for the CBSE Class 10 Science board exam? We’ve got you covered! Download the latest CBSE Class 10 Science Sample Paper 2025 with complete solutions. Practicing sample papers is one of the best ways to understand question patterns, improve speed, and boost confidence.

📄 Sample Paper Overview:

Subject: Science

Class: 10

Board: CBSE

Year: 2025 (based on new syllabus)

Total Marks: 80

Time: 3 Hours

📥 Download Sample Paper PDF:

👉 Download CBSE Class 10 Science Sample Paper 2025 – PDF

General Instructions:

All questions are compulsory.

The question paper is divided into four sections A, B, C, and D.

Internal choices are provided in some questions.

Draw neat diagrams wherever necessary.

🔹 Section A (1 mark each) (1×7 = 7 marks)

State the law of conservation of mass.
What is the atomic number of oxygen?
Which gas is released during the reaction of zinc and hydrochloric acid?
Name the green pigment found in plant leaves.
Write the full form of DNA.
Name one natural and one artificial source of energy.
What is the SI unit of electric current?

🔹 Section B (2 marks each) (2×6 = 12 marks)

Why are decomposition reactions called the opposite of combination reactions? Give one example.
Differentiate between Asexual and Sexual reproduction (any two points).
What are homologous structures? Give one example from animals.
Define the term “refraction” of light.
Explain the cause of acid rain.
What are biodegradable and non-biodegradable substances? Give one example of each.

🔹 Section C (3 marks each) (3×5 = 15 marks)

Write the chemical equation and name the type of reaction:

a) Magnesium burns in air

b) Iron reacts with copper sulfate solution

c) Lead nitrate is heated

Describe the process of double circulation in humans.
Explain Mendel’s monohybrid cross experiment with a diagram.
Why is the ozone layer important? Mention any two ways to protect it.
Explain the working of a human eye with a diagram.

🔹 Section D (5 marks each) (5×3 = 15 marks)

(a) Draw a well-labelled diagram of the carbon cycle.

(b) Explain why increasing CO₂ in the atmosphere is a concern.

(a) Define power of a lens.

(b) An object is placed at 20 cm in front of a convex lens of focal length 10 cm. Find the position of the image. (Show calculations)

(a) Explain the process of fertilization in flowering plants.

(b) Draw a labelled diagram of the female reproductive system in humans.

📌 Internal Assessment (20 marks):

As per CBSE guidelines, this includes:

Periodic Tests

Practical Work

Portfolio

Subject Enrichment Activities

🧠 Answer Key (Short Sample):

1. Mass is neither created nor destroyed in a chemical reaction.

2. 8

3. Hydrogen gas

4. Chlorophyll

5. Deoxyribonucleic acid

6. Natural: Sun; Artificial: Battery

7. Ampere (A)

🎯 Exam Tips for Science:

Focus on NCERT textbook concepts

Practice diagrams (Human Eye, Electric Circuit, etc.)

Revise definitions and chemical reactions regularly

Solve at least 5 previous year sample papers

📌 Conclusion:

Don’t just memorize—understand the logic and application behind science concepts. Use our downloadable resources, and you’ll be all set to score high!

Tags: Class 10, Science, CBSE Sample Paper, 2025, Free PDF, Board Exam, NCERT, SmartSamplePapers

CBSE Class 10 Science Sample Paper 2025 – PDF with Solutions & Exam Tips