Field Methods in Environmental Science MCQs 50 Score: 0 Attempted: 0/50 Subscribe 1. : Which of the following is commonly used to measure tree height in the field? (A) Hygrometer (B) Clinometer (C) Lux meter (D) Barometer 2. : The quadrat method is primarily used for: (A) Measuring rainfall (B) Estimating plant population and cover (C) Soil nutrient analysis (D) Recording wind speed 3. : A line transect in environmental science is used to: (A) Estimate animal density (B) Sample vegetation along a gradient (C) Measure soil pH (D) Record light intensity 4. : Which tool is used to collect soil samples in field studies? (A) Soil auger (B) Microscope (C) Spectrophotometer (D) Turbidimeter 5. : The capture-mark-recapture method is widely used to estimate: (A) Plant diversity (B) Animal population size (C) Water turbidity (D) Soil porosity 6. : Which of the following is used to measure light intensity in the field? (A) Anemometer (B) Lux meter (C) DO meter (D) Rain gauge 7. : A pitfall trap is typically used for: (A) Studying insects and small ground animals (B) Measuring tree growth (C) Collecting rainfall (D) Measuring wind velocity 8. : Which device is used to measure wind speed? (A) Hygrometer (B) Anemometer (C) Clinometer (D) Barometer 9. : A Secchi disk is used in aquatic fieldwork to measure: (A) Water temperature (B) Water clarity/light penetration (C) Dissolved oxygen (D) Soil depth 10. : The point intercept method is mainly used for: (A) Soil sampling (B) Estimating vegetation cover (C) Air quality monitoring (D) Measuring tree diameter 11. : Which technique is commonly used to estimate bird populations? (A) Mist netting (B) Quadrat method (C) Line transect only (D) Soil coring 12. : A rain gauge is used for measuring: (A) Soil nutrients (B) Precipitation (C) Wind velocity (D) Light intensity 13. : Which of the following is used to measure soil moisture in the field? (A) Clinometer (B) Tensiometer (C) Lux meter (D) Rain gauge 14. : A Sherman trap is mainly used to capture: (A) Small mammals (B) Birds (C) Soil microbes (D) Amphibians 15. : Which field method is commonly used to study aquatic invertebrates? (A) Plankton net (B) Pitfall trap (C) Mist net (D) Soil auger 16. : The belt transect method is an extension of: (A) Quadrat method (B) Line transect method (C) Capture-recapture method (D) Point intercept method 17. : Which instrument is used for measuring atmospheric pressure in the field? (A) Hygrometer (B) Barometer (C) Anemometer (D) Thermometer 18. : Which technique is used to study plant canopy cover? (A) Canopy densiometer (B) Secchi disk (C) Lux meter (D) Turbidimeter 19. : Which is a non-destructive field method for vegetation study? (A) Remote sensing (B) Quadrat harvest method (C) Soil excavation (D) Pitfall trapping 20. : Which field instrument measures relative humidity? (A) Anemometer (B) Hygrometer (C) Rain gauge (D) Clinometer 21. : Which method is used to study soil profile in the field? (A) Soil pit excavation (B) Mist netting (C) Capture-mark-recapture (D) Spectrophotometry 22. : A flow meter in fieldwork is used to measure: (A) Water current velocity (B) Air humidity (C) Soil salinity (D) Rainfall 23. : Which technique is most suitable for estimating tree diameter? (A) DBH tape (Diameter at Breast Height) (B) Hygrometer (C) Pitfall trap (D) Lux meter 24. : A Malaise trap is primarily used for capturing: (A) Flying insects (B) Soil microbes (C) Amphibians (D) Birds 25. : Which sampling technique is used for fish population studies? (A) Electrofishing (B) Quadrat sampling (C) Mist netting (D) Pitfall trapping 26. : Which method is commonly used to study species diversity in a habitat? (A) Quadrat method (B) Line transect method (C) Capture-recapture method (D) All of the above 27. : Which tool is used to measure soil compaction? (A) Penetrometer (B) Hygrometer (C) Clinometer (D) DO meter 28. : A thermometer in field studies is used for measuring: (A) Soil temperature (B) Air temperature (C) Water temperature (D) All of the above 29. : Which of the following is a biological method of environmental field study? (A) Pitfall trapping (B) Mist netting (C) Capture-mark-recapture (D) All of the above 30. : Which instrument is used for geographic positioning in fieldwork? (A) GPS device (B) Lux meter (C) Clinometer (D) Barometer 31. : Which method is used for estimating biomass in the field? (A) Harvest method (B) Quadrat sampling (C) Remote sensing (D) All of the above 32. : The canopy cover of a forest is measured using: (A) Canopy densiometer (B) Soil auger (C) Lux meter (D) Hygrometer 33. : Which trap is commonly used for bird banding? (A) Mist net (B) Pitfall trap (C) Sherman trap (D) Malaise trap 34. : Which method involves counting all individuals within a defined area? (A) Quadrat method (B) Capture-recapture method (C) Random sampling (D) Transect method 35. : A respirometer in field studies is used to measure: (A) Respiration rate of organisms (B) Soil hardness (C) Tree age (D) Rainfall 36. : Which device is commonly used to measure CO₂ concentration in field studies? (A) Infrared Gas Analyzer (B) Barometer (C) Lux meter (D) DO meter 37. : Which method is best suited for sampling marine plankton? (A) Plankton net (B) Mist net (C) Soil auger (D) Line transect 38. : Which is a field-based remote sensing tool? (A) Drone with sensors (B) Soil corer (C) Clinometer (D) Rain gauge 39. : Which sampling method reduces bias in environmental fieldwork? (A) Random sampling (B) Systematic sampling (C) Stratified sampling (D) All of the above 40. : Which of the following is measured in hydrological field studies? (A) Stream velocity (B) Groundwater level (C) Water quality (D) All of the above 41. : Which tool is used to measure tree age without cutting it down? (A) Increment borer (B) Clinometer (C) Soil auger (D) Lux meter 42. : The point count method is commonly used to study: (A) Birds (B) Soil microbes (C) Insects (D) Amphibians 43. : Which sampling tool is used for studying benthic organisms? (A) Ekman grab sampler (B) Mist net (C) Sherman trap (D) Clinometer 44. : Which device measures dissolved oxygen in water during fieldwork? (A) DO meter (B) Turbidimeter (C) Hygrometer (D) Anemometer 45. : Which is an example of in situ measurement in fieldwork? (A) Soil pH measurement in the field (B) Soil nutrient analysis in a lab (C) Water filtration in lab (D) Vegetation dried in an oven 46. : Which type of sampling is most suitable for studying rare species? (A) Stratified sampling (B) Random sampling (C) Purposive sampling (D) Systematic sampling 47. : Which method is used for marking animals in capture-recapture studies? (A) Ear tagging (B) Banding (C) Paint marking (D) All of the above 48. : Which method is used for estimating forest density? (A) Quadrat method (B) Point-centered quarter method (C) Line transect (D) All of the above 49. : Which instrument is essential in geological field methods? (A) Compass clinometer (B) Lux meter (C) DO meter (D) Microscope 50. : The ultimate aim of field methods in environmental science is: (A) To collect reliable ecological data for analysis and conservation (B) To replace laboratory studies (C) To ignore biodiversity (D) To eliminate environmental variability