Class 10 Science Chapter 13: Our Environment — 5 Marker Important Questions
Practice Our Environment 5 Marker important questions and mock-test sets for CBSE revision.
Topic-wise important and practice questions
Review question distribution across chapter topics for 5 Mark questions.
| Topic | 5 Mark |
|---|---|
| Biodegradable Substances | 1 |
| Food Chains and Trophic Levels | 3 |
| Non-Biodegradable Substances | 3 |
| Environmental Effects of Biodegradable Waste | 4 |
| Natural and Human-Made Ecosystems | 2 |
| CFCs and Ozone Depletion | 2 |
| Ecosystem: Biotic and Abiotic Components | 3 |
| Limits on Food-Chain Length | 2 |
| Ozone Layer and UV Protection | 2 |
| Waste Segregation and Local Waste Management | 2 |
| Biological Magnification | 2 |
| Environment-Friendly Practices | 3 |
| Food Webs and Interdependence | 3 |
| International Action on Ozone-Depleting Substances | 2 |
| Removing a Trophic Level and Ecosystem Balance | 2 |
| Producers and Photosynthetic Autotrophs | 2 |
| Trophic Position and Pollutant Concentration | 1 |
| Environmental Effects of Non-Biodegradable Waste | 1 |
| Enzyme Specificity and Biodegradability | 0 |
| Formation of Ozone in the Upper Atmosphere | 2 |
| Lifestyle, Disposable Materials and Waste Generation | 1 |
| Unidirectional Flow of Energy | 1 |
| Decomposers and Nutrient Recycling | 2 |
| Energy Capture by Producers | 0 |
| Entry of Pesticides into Food Chains | 2 |
| Consumers: Herbivores, Carnivores, Omnivores and Parasites | 1 |
| Ten Percent Law of Energy Transfer | 1 |
5 Marker Preparation & Exam Strategy
5 Mark long answer questions require comprehensive, well-structured answers incorporating definitions, detailed explanations, diagrams, and applied problem-solving.
- Begin with a concise definition or introduction before diving into subsections.
- Break answers into sub-headings: Definition, Working Principle, Step-by-Step Procedure, and Conclusion.
- Draw clear, fully labeled diagrams and highlight key equations in boxed sections.
- Allocate time prudently: spend roughly 10–12 minutes constructing a well-rounded 5-mark response.
Sample Questions
Q1. Provide a comprehensive explanation of the major topic in Our Environment, detailing its mechanism and significance.
Model Answer: Structure the response into definition, detailed working mechanism, practical significance, and relevant schematic diagram.
Q2. Discuss the experimental setup or practical investigation associated with Our Environment, including observations and conclusions.
Model Answer: Detail the apparatus required, procedure followed, observations recorded, and logical conclusions drawn.
Q3. Evaluate how concepts from Our Environment connect with real-world technological or natural systems.
Model Answer: Present a multi-point analysis highlighting scientific principles, societal applications, and analytical insights.