MCQ questions for class 10 Science Chapter 15 Our Environment
Question 1: What is the primary source of energy for most ecosystems?
Sunlight
Wind
Fossil fuels
Water
Question 2: Which of the following is a decomposer in the ecosystem?
Herbivores
Carnivores
Producers
Fungi
Question 3: What is the role of decomposers in an ecosystem?
Produce oxygen
Break down dead organic matter
Perform photosynthesis
Consume other organisms
Question 4: Which of the following is a non-biodegradable waste?
Vegetable peels
Paper
Plastic bags
Fruit scraps
Question 5: What is the term for the variety of plants, animals, and microorganisms in an area?
Eutrophication
Biodiversity
Biodegradation
Deforestation
Question 6: Which gas is responsible for the greenhouse effect?
Oxygen
Carbon dioxide
Nitrogen
Methane
Question 7: What is the main function of the ozone layer?
Trap heat in the atmosphere
Protect against harmful ultraviolet (UV) rays
Produce oxygen
Absorb carbon dioxide
Question 8: Which of the following is an example of a non-renewable resource?
Solar energy
Wind energy
Natural gas
Biomass
Question 9: What is the process by which green plants make their food?
Respiration
Photosynthesis
Fermentation
Combustion
Question 10: What is the term for the gradual change in the characteristics of a population over generations?
Evolution
Adaptation
Mutation
Speciation
Question 11: Which of the following is a renewable resource?
Coal
Natural gas
Solar energy
Petroleum
Question 12: What is the term for the process of breakdown of complex organic compounds into simpler ones by microorganisms?
Photosynthesis
Fermentation
Respiration
Decomposition
Question 13: Which of the following is a greenhouse gas?
Oxygen
Nitrogen
Methane
Hydrogen
Question 14: What is the main cause of the depletion of the ozone layer?
Chlorofluorocarbons (CFCs)
Carbon dioxide (CO2)
Methane (CH4)
Sulfur dioxide (SO2)
Question 15: Which of the following is an example of a biotic component of an ecosystem?
Air
Water
Plants
Minerals
Question 16: What is the term for the network of interconnected food chains in an ecosystem?
Decomposition
Food web
Photosynthesis
Respiration
Question 17: What is the process by which water is continuously transferred between the earth and the atmosphere?
Photosynthesis
Respiration
Transpiration
Condensation
Question 18: What is the term for the killing of pests to protect crops?
Pollination
Defoliation
Fertilization
Pesticides
Question 19: Which of the following is an example of a non-living component of an ecosystem?
Plants
Animals
Microorganisms
Soil
Question 20: What is the term for the loss of water vapor from plant leaves?
Transpiration
Photosynthesis
Respiration
Condensation
Welcome to our page dedicated to MCQ (Multiple Choice Questions) for Class 10 Science 🌐📚 Here, you will find a comprehensive collection of MCQ questions designed for Class 10 students, covering various science topics. Our goal is to make learning easy and enjoyable, so we have crafted these questions with detailed answers to help you grasp the concepts effortlessly. Whether you are preparing for exams or just want to enhance your understanding of Class 10 Science, our curated set of MCQs is here to assist you. We understand the importance of clarity, so each question is accompanied by precise answers. You can also download the PDF version for convenient offline access. Explore the world of MCQs and elevate your learning experience. Feel free to use these resources to strengthen your knowledge and excel in your academic journey. Happy learning