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Q: 1. What are the key topics covered in the Class 7 Science syllabus?

Ans. The Class 7 Science syllabus generally includes topics such as physical and chemical changes, nutrition in plants and animals, the structure of the human body, ecosystems, weather and climate, and basic principles of physics like motion and force. Each topic is designed to build a fundamental understanding of scientific concepts and encourage inquiry-based learning.

Q: 2. How can students effectively prepare for their Class 7 Science exams?

Ans. Students can prepare for their Class 7 Science exams by following a structured study plan that includes regular revision of concepts, practicing previous years' question papers, utilizing visual aids like diagrams and charts for better understanding, and engaging in group discussions to clarify doubts. Additionally, hands-on experiments and practical applications of concepts can enhance learning and retention.

Q: 3. What types of questions are typically included in a Class 7 Science exam?

Ans. A Class 7 Science exam typically includes a mix of objective questions, such as multiple-choice and fill-in-the-blank questions, as well as subjective questions that require short answers and explanations. Questions may focus on definitions, concepts, applications of scientific principles, and the ability to analyze and interpret data from experiments or diagrams.

Q: 4. Why is it important to understand the scientific method in Class 7 Science?

Ans. Understanding the scientific method is crucial for students as it provides a systematic approach to inquiry and experimentation. It teaches them how to formulate hypotheses, conduct experiments, collect data, and draw conclusions. This process not only enhances critical thinking skills but also prepares students for future scientific studies and instills a sense of curiosity about the world around them.

Q: 5. How can practical experiments enhance learning in Class 7 Science?

Ans. Practical experiments enhance learning in Class 7 Science by allowing students to apply theoretical concepts in real-world scenarios. Engaging in hands-on activities helps students understand scientific principles more deeply, fosters teamwork and collaboration, and boosts confidence in conducting experiments. This experiential learning approach makes science more relatable and enjoyable, encouraging students to explore further.

Table of contents
Section – A
Section – B
Section – C
Section – D

Time: 3 Hours
Total Marks: 80

General Instructions

This question paper consists of 34 questions in total. All questions are compulsory.

Questions 1–7 are multiple-choice questions (MCQs) and carry 1 mark each. Write the correct answer in your answer sheet.
Questions 8–17 are very short answer type and carry 2 marks each.
Questions 18–28 are short answer type and carry 3 marks each.
Questions 29–34 are long answer type and carry 5 marks each.

Section – A

Q1. Which substance turns red litmus blue? (1 marks)
(a) Vinegar
(b) Lemon
(c) Soap
(d) Curd

Ans: (c) Soap

Q2. What is the unit of electric current? (1 marks)
(a) Volt
(b) Ampere
(c) Ohm
(d) Watt

Ans: (b) Ampere

Q3. Which property makes metals sonorous? (1 marks)
(a) Lustre
(b) Hardness
(c) Ability to produce sound
(d) Brittleness

Ans: (c) Ability to produce sound

Q4. What is galvanization? (1 marks)
(a) Painting iron
(b) Coating with zinc
(c) Oiling
(d) Heating

Ans: (b) Coating with zinc

Q5. Which hormone is responsible for growth in adolescence? (1 marks)
(a) Insulin
(b) Thyroxin
(c) Growth hormone
(d) Adrenaline

Ans: (c) Growth hormone

Q6. What is the SI unit of heat? (1 marks)
(a) Joule
(b) Newton
(c) Pascal
(d) Kelvin

Ans: (a) Joule

Q7. Which of the following is a periodic motion? (1 marks)
(a) Car on road
(b) Pendulum swing
(c) Falling leaf
(d) Running child

Ans: (b) Pendulum swing

Section – B

Q8. What is a neutral substance? (2 marks)

Ans: Neither acidic nor basic (pH 7), e.g., distilled water.

Q9. Name two symbols used in circuit diagrams. (2 marks)

Ans: Wire (straight line), Resistor (zigzag line).

Q10. Give two uses of metals. (2 marks)

Ans: Making wires (copper), making utensils (aluminium).

Q11. What is crystallization? (2 marks)

Ans: Process of forming crystals from solution, e.g., salt from sea water.

Q12. What is puberty? (2 marks)

Ans: Onset of adolescence with body changes for reproduction (10–13 yrs).

Q13. How does sea breeze occur? (2 marks)

Ans: Land heats faster, hot air rises, cool sea air moves in (daytime convection).

Q14. What is distance-time graph? (2 marks)

Ans: Graph showing distance vs time. Straight line = uniform speed.

Q15. What is circulation in animals? (2 marks)

Ans: Transport of blood (oxygen, nutrients, waste) via heart & vessels.

Q16. What is autotrophic nutrition? (2 marks)

Ans: Organisms make own food (plants via photosynthesis).

Q17. What is a convex mirror? (2 marks)

Ans: Curved outward, forms virtual & diminished images (rear-view mirrors).

Section – C

Q18. Explain the use of antacids. (3 marks)

Ans: Neutralize excess stomach acid (e.g., magnesium hydroxide).

Q19. What is heating effect of electric current? (3 marks)

Ans: Current through resistance produces heat (used in heaters, toasters).

Q20. Describe the reaction of metals with oxygen. (3 marks)

Ans: Metals + O₂ → Metal oxides (e.g., iron → rust; Al forms protective oxide).

Q21. How is baking soda made? (3 marks)

Ans: From sodium chloride, ammonia, CO₂ in Solvay process.

Q22. Why is balanced diet important in adolescence? (3 marks)

Ans: Provides nutrients, energy, immunity during rapid growth.

Q23. Explain radiation with an example. (3 marks)

Ans: Heat transfer without medium (e.g., heat from sun/hot iron).

Q24. Differentiate between speed and velocity. (3 marks)

Ans: Speed = scalar; Velocity = vector (magnitude + direction).

Q25. How does breathing occur in humans? (3 marks)

Ans: Inhalation (diaphragm contracts), Exhalation (diaphragm relaxes).

Q26. Explain saprophytic nutrition with example. (3 marks)

Ans: Feeding on dead matter, e.g., fungi, mushrooms.

Q27. How do plane mirrors form images? (3 marks)

Ans: Form virtual, erect, same-size image behind mirror.

Q28. What is the rotation of Earth? (3 marks)

Ans: Spinning on axis (24 hrs), causing day & night.

Section – D

Q29. (a) What is observation in science? (5 marks)
(b) Explain with examples.
(c) How does it lead to hypotheses?

Ans: (a) Observation = noting phenomena via senses.
(b) Apple falling (gravity), plants bending to light.
(c) Leads to testable hypotheses for experiments.

Q30. (a) What is pH? (5 marks)
(b) Explain acid rain.
(c) Why is it harmful?

Ans: (a) pH = measure of acidity/basicity (0–14 scale).
(b) Acid rain = rain pH < 5.6 due to SO₂, NO₂.
(c) Damages soil, buildings, aquatic life.

Q31. (a) What is electromagnet? (5 marks)
(b) Explain its making.
(c) Draw diagram.

Ans: (a) Temporary magnet via electric current.
(b) Coil wire around iron core, pass current.
(c) Diagram: Coil on nail, connected to battery.

Q32. (a) What is displacement reaction? (5 marks)
(b) Give two examples.
(c) Explain reactivity series.

Ans: (a) More reactive metal displaces less reactive one.
(b) Zn + CuSO₄ → ZnSO₄ + Cu; Fe + CuSO₄ → FeSO₄ + Cu.
(c) Reactivity series arranges metals by reactivity.

Q33. (a) What is reproductive health? (5 marks)
(b) Explain changes in girls.
(c) Importance of hygiene.

Ans: (a) Well-being in reproductive processes.
(b) Menstruation, breast growth, wider hips.
(c) Hygiene prevents infections during adolescence.

Q34. (a) What is thermometer? (5 marks)
(b) Explain types.
(c) Draw clinical thermometer.

Ans: (a) Device to measure temperature.
(b) Clinical (body), Laboratory (general).
(c) Diagram: Bulb, stem, scale (35–42 °C).

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FAQs on Class 7 Science: Sample Paper Solutions - 2 - Sample Papers For Class 7

1. What are the key topics covered in the Class 7 Science syllabus?

Ans. The Class 7 Science syllabus generally includes topics such as physical and chemical changes, nutrition in plants and animals, the structure of the human body, ecosystems, weather and climate, and basic principles of physics like motion and force. Each topic is designed to build a fundamental understanding of scientific concepts and encourage inquiry-based learning.

2. How can students effectively prepare for their Class 7 Science exams?

Ans. Students can prepare for their Class 7 Science exams by following a structured study plan that includes regular revision of concepts, practicing previous years' question papers, utilizing visual aids like diagrams and charts for better understanding, and engaging in group discussions to clarify doubts. Additionally, hands-on experiments and practical applications of concepts can enhance learning and retention.

3. What types of questions are typically included in a Class 7 Science exam?

Ans. A Class 7 Science exam typically includes a mix of objective questions, such as multiple-choice and fill-in-the-blank questions, as well as subjective questions that require short answers and explanations. Questions may focus on definitions, concepts, applications of scientific principles, and the ability to analyze and interpret data from experiments or diagrams.

4. Why is it important to understand the scientific method in Class 7 Science?

Ans. Understanding the scientific method is crucial for students as it provides a systematic approach to inquiry and experimentation. It teaches them how to formulate hypotheses, conduct experiments, collect data, and draw conclusions. This process not only enhances critical thinking skills but also prepares students for future scientific studies and instills a sense of curiosity about the world around them.

5. How can practical experiments enhance learning in Class 7 Science?

Ans. Practical experiments enhance learning in Class 7 Science by allowing students to apply theoretical concepts in real-world scenarios. Engaging in hands-on activities helps students understand scientific principles more deeply, fosters teamwork and collaboration, and boosts confidence in conducting experiments. This experiential learning approach makes science more relatable and enjoyable, encouraging students to explore further.

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Oct 06, 2025 Last updated

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