SCERT D. El. Ed 2026 - Environmental Science (EVS)

SCERT D. El. Ed 2026 – Environmental Science

SCERT D. El. Ed 2026 – Environmental Science

Environmental Studies (EVS) Part 1

Q1. What is the percentage of nitrogen in the Earth’s atmosphere?
  • A. About 21%
  • B. About 78%
  • C. About 0.04%
  • D. About 1%
Correct Answer: B. About 78%
Q2. Which sphere of the Earth is composed of rocks, minerals and soil?
  • A. Hydrosphere
  • B. Atmosphere
  • C. Lithosphere
  • D. Biosphere
Correct Answer: C. Lithosphere
Q3. The zone of the Earth where life exists is called the:
  • A. Lithosphere
  • B. Hydrosphere
  • C. Atmosphere
  • D. Biosphere
Correct Answer: D. Biosphere
Q4. Which of the following is part of the social environment?
  • A. Rivers
  • B. Schools and laws
  • C. Forests
  • D. Soil
Correct Answer: B. Schools and laws
Q5. Which gas in the atmosphere shields the Earth from harmful ultraviolet radiation?
  • A. Oxygen
  • B. Nitrogen
  • C. Ozone
  • D. Carbon dioxide
Correct Answer: C. Ozone
Q6. All external conditions and surroundings that affect a living organism constitute its:
  • A. Genetics
  • B. Environment
  • C. Diet
  • D. Climate only
Correct Answer: B. Environment
Q7. All water on, above and below the Earth’s surface forms the:
  • A. Atmosphere
  • B. Hydrosphere
  • C. Lithosphere
  • D. Biosphere
Correct Answer: B. Hydrosphere
Q8. Which of the following is NOT a component of the natural environment?
  • A. Lithosphere
  • B. Hydrosphere
  • C. Cultural traditions
  • D. Atmosphere
Correct Answer: C. Cultural traditions
Q9. The percentage of oxygen in the atmosphere is approximately:
  • A. 78%
  • B. 21%
  • C. 0.04%
  • D. 50%
Correct Answer: B. 21%
Q10. The relationship between the natural and social environments is best described as:
  • A. Independent
  • B. One-way
  • C. Bidirectional and interactive
  • D. Random
Correct Answer: C. Bidirectional and interactive
Q11. The layer of gases held around the Earth by gravity is called the:
  • A. Hydrosphere
  • B. Lithosphere
  • C. Atmosphere
  • D. Mesosphere
Correct Answer: C. Atmosphere
Q12. Which of the following is an example of a non-living component of the environment?
  • A. Tree
  • B. Bird
  • C. Air
  • D. Bacteria
Correct Answer: C. Air
Q13. Which of the following is a physical (abiotic) factor of the environment?
  • A. Bacteria
  • B. Climate
  • C. Predators
  • D. Population size
Correct Answer: B. Climate
Q14. The shape and relief of the land surface is referred to as:
  • A. Climate
  • B. Topography
  • C. Soil texture
  • D. Habitat
Correct Answer: B. Topography
Q15. Which property of soil refers to its acidity or alkalinity?
  • A. Texture
  • B. pH
  • C. Color
  • D. Moisture
Correct Answer: B. pH
Q16. Which of the following is an example of a biotic factor?
  • A. Sunlight
  • B. Soil texture
  • C. Decomposers
  • D. Air pressure
Correct Answer: C. Decomposers
Q17. Decomposers in an ecosystem mainly:
  • A. Produce food by photosynthesis
  • B. Eat living plants
  • C. Break down dead organic matter
  • D. Hunt other animals
Correct Answer: C. Break down dead organic matter
Q18. The plant life of a region is collectively called:
  • A. Fauna
  • B. Flora
  • C. Biota
  • D. Habitat
Correct Answer: B. Flora
Q19. The animal life of a region is collectively called:
  • A. Flora
  • B. Fauna
  • C. Microbiome
  • D. Ecosystem
Correct Answer: B. Fauna
Q20. Which of the following best illustrates a human factor influencing the environment?
  • A. A volcanic eruption
  • B. Industrial extraction of fossil fuels
  • C. A river flood from heavy rain
  • D. Soil formation by weathering
Correct Answer: B. Industrial extraction of fossil fuels
Q21. Which factor most directly determines which plant communities can survive in a region?
  • A. Climate
  • B. Currency
  • C. Language
  • D. Religion
Correct Answer: A. Climate
Q22. Bees and butterflies pollinating flowers is an example of which type of biological interaction?
  • A. Predation
  • B. Mutualism
  • C. Competition
  • D. Parasitism
Correct Answer: B. Mutualism
Q23. Roots of plants help to:
  • A. Increase soil erosion
  • B. Hold soil in place and prevent erosion
  • C. Pollute water
  • D. Reduce rainfall
Correct Answer: B. Hold soil in place and prevent erosion
Q24. Rapid population growth typically leads to:
  • A. Decreased demand for resources
  • B. Greater pressure on natural resources
  • C. Larger forest cover
  • D. Lower waste generation
Correct Answer: B. Greater pressure on natural resources

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