Here's an updated version of the Class 10 Science sample paper that includes a Case Study section. The case study is designed to assess students' ability to apply their knowledge to real-life scenarios.
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Class 10 Science Sample Paper
Time: 3 Hours
Maximum Marks: 80
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Section A: Objective Type Questions (1 Mark each)
1. Which of the following is a non-metal?
a) Iron
b) Sodium
c) Oxygen
d) Magnesium
2. The SI unit of electric current is:
a) Ampere
b) Volt
c) Ohm
d) Coulomb
3. Which of the following is not a greenhouse gas?
a) Carbon dioxide
b) Methane
c) Nitrogen
d) Water vapor
4. In the periodic table, the number of valence electrons in Group 16 elements is:
a) 2
b) 6
c) 8
d) 4
5. The process of a substance changing directly from a solid to a gas is called:
a) Condensation
b) Sublimation
c) Evaporation
d) Melting
6. Which of the following is used as a catalyst in the Haber process?
a) Iron
b) Nickel
c) Platinum
d) Copper
7. The rate of a chemical reaction increases with:
a) Decreasing temperature
b) Increasing pressure
c) Decreasing surface area
d) Increasing concentration of reactants
8. The organelle known as the 'powerhouse of the cell' is:
a) Nucleus
b) Ribosome
c) Mitochondria
d) Endoplasmic reticulum
9. Which of the following is a renewable source of energy?
a) Coal
b) Natural gas
c) Wind energy
d) Nuclear energy
10. The fundamental unit of life is:
a) Tissue
b) Organ
c) Cell
d) System
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Section B: Short Answer Questions (2 Marks each)
11. Explain the process of photosynthesis.
12. What is the difference between a physical change and a chemical change? Provide one example of each.
13. Describe the structure and function of the human respiratory system.
14. Write the balanced chemical equation for the reaction between hydrochloric acid and sodium hydroxide.
15. Define and explain the term ‘ecosystem’.
16. What are isotopes? Give an example of an isotope.
17. Explain the term ‘biodegradable’. Give two examples of biodegradable materials.
18. What is the principle behind the working of a transformer?
19. What are the effects of deforestation on the environment?
20. Describe the role of enzymes in biological reactions.
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Section C: Short Answer Questions (3 Marks each)
21. Differentiate between ionic and covalent bonds with examples.
22. Explain how renewable resources differ from non-renewable resources. Provide two examples of each.
23. Discuss the importance of the nitrogen cycle in the ecosystem.
24. Describe the different types of pollution and their impact on the environment.
25. What is Newton's second law of motion? Derive the formula for force using this law.
26. Explain the concept of refraction of light with the help of a diagram.
27. What is the significance of the periodic table? How are elements arranged in it?
28. Discuss the role of human activities in global warming.
29. What is the difference between an endothermic reaction and an exothermic reaction? Provide examples of each.
30. Describe the process of digestion in the human body, mentioning the organs involved.
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Section D: Long Answer Questions (5 Marks each)
31. Explain the different methods of heat transfer with suitable examples and diagrams.
32. Discuss the process of cellular respiration. How does it differ from photosynthesis?
33. Describe the structure and function of different types of plant tissues.
34. Explain the concept of the greenhouse effect. How does it contribute to global warming?
35. Describe the process of natural selection and its importance in evolution.
36. Discuss the different types of chemical reactions with examples.
37. Explain the working of the human circulatory system, including the structure of the heart and blood vessels.
38. Discuss the role of different types of forces in everyday life.
39. Describe the process of wastewater treatment. Why is it important for environmental health?
40. Explain the concept of electrolysis and its applications in industry.
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Section E: Case Study (5 Marks each)
41. Case Study: Water Purification
Context: In a small town, the local government has introduced a new water purification system to ensure the supply of clean drinking water. The system uses a combination of filtration, sedimentation, and chemical treatment to remove impurities.
Questions:
1. Explain the principle behind each stage of the water purification process described.
2. What are the potential benefits of this purification system for public health?
3. Discuss any two possible challenges that could arise with the implementation of this system.
42. Case Study: Greenhouse Effect
Context: A recent study shows that the average global temperature has been rising over the past century due to increased levels of greenhouse gases like carbon dioxide and methane. This has led to more frequent extreme weather events.
Questions:
1. What is the greenhouse effect and how does it contribute to global warming?
2. Identify and explain two major sources of greenhouse gases.
3. Suggest two measures that can be taken to mitigate the impact of the greenhouse effect.
43. Case Study: Plant Growth Experiment
Context: A student conducted an experiment to determine the effect of different types of fertilizers on plant growth. Three groups of plants were given different fertilizers while a control group received no fertilizer.
Questions:
1. What are the variables in this experiment?
2. How would you ensure that the experiment is
fair and reliable?
3. Discuss the possible outcomes of the experiment and their implications for agricultural practices.
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This sample paper now includes a case study section, which encourages students to apply their knowledge to real-world scenarios and analyze information critically.
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