MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which isotope of carbon is very rare and radioactive? |
| A. | Carbon-12 |
| B. | Carbon-13 |
| C. | Carbon-14 |
| D. | Carbon-11 |
| Answer» D. Carbon-11 | |
| 2. |
Sources of carbondioxide are from fossil fuels and: |
| A. | Forests |
| B. | Wastes |
| C. | Urea |
| D. | Gasification Plants |
| Answer» E. | |
| 3. |
Concentration of Carbon dioxide has increased from |
| A. | 300 ppm to 370 ppm |
| B. | 280 ppm to 370 ppm |
| C. | 200 ppm to 370 ppm |
| D. | 380 ppm to 370 ppm |
| Answer» D. 380 ppm to 370 ppm | |
| 4. |
What are two main processes which occur in natural carbon cycle? |
| A. | Photosynthesis and decomposition |
| B. | Photosynthesis and respiration |
| C. | Photosynthesis and combustion |
| D. | Photosynthesis and metabolism |
| Answer» E. | |
| 5. |
Where does a peak biological activity occur in spring? |
| A. | Earth |
| B. | Land |
| C. | Ocean |
| D. | Air |
| Answer» D. Air | |
| 6. |
As sunlight increases in spring, an explosive growth of plankton ocurrs, which is known as |
| A. | Spring bloom |
| B. | Winter bloom |
| C. | Summer bloom |
| D. | Weather bloom |
| Answer» B. Winter bloom | |
| 7. |
Planktons live on surface of: |
| A. | Pond |
| B. | River |
| C. | Ocean |
| D. | Lake |
| Answer» D. Lake | |
| 8. |
The Arctic ice cap is thinning by |
| A. | 20 cm a year |
| B. | 10cm a year |
| C. | 30 cm a year |
| D. | 40 cm a year |
| Answer» C. 30 cm a year | |
| 9. |
Nitrous oxide are emitted in atmosphere by use of synthetic fertilizers for: |
| A. | Mining |
| B. | Poultry farming |
| C. | Agriculture Land |
| D. | Industries |
| Answer» D. Industries | |
| 10. |
In 1992, representatives from nearly 180 nations, met in |
| A. | Rio de Janerio |
| B. | Brazil |
| C. | USA |
| D. | Canada |
| Answer» B. Brazil | |
| 11. |
'UNCED' stands for |
| A. | United Nations Conference on Economic and Development |
| B. | United Nations Conference on Ecological and Development |
| C. | United Nations Conference on Earlychildhood and Development |
| D. | United Nations Conference on Environment and Development |
| Answer» E. | |
| 12. |
'UNEP' stands for |
| A. | United Nations Economical Programme |
| B. | United Nations Environmental Programme |
| C. | United Nations Environmental Protocol |
| D. | United Nations Ecological Programme |
| Answer» C. United Nations Environmental Protocol | |
| 13. |
Carbon dioxide can be pumped into spent oil, gas wells and into |
| A. | Oceans |
| B. | Atmosphere |
| C. | Underground water |
| D. | Deep saline reserviors |
| Answer» E. | |
| 14. |
Earth's surface maintains a nearly constant temperature, approximately |
| A. | 50 °F and 90 °F |
| B. | 50 °F and 100 °F |
| C. | 50 °F and 800 °F |
| D. | 50 °F and 60 °F |
| Answer» E. | |
| 15. |
What does ozone depleting chemical, HGs, contributing to ? |
| A. | Global Warming |
| B. | Eutrophication |
| C. | Deforestation |
| D. | Urbanization |
| Answer» B. Eutrophication | |
| 16. |
Due to greenhouse gases, atmosphere absorbs more |
| A. | Heat |
| B. | Light |
| C. | Ultravoilet Energy |
| D. | Infrared Energy |
| Answer» E. | |
| 17. |
Lowest values of ozone, found under normal condition around the |
| A. | Equator |
| B. | Poles |
| C. | Sub tropical regions |
| D. | Tropical regions |
| Answer» B. Poles | |
| 18. |
'HPa' stands for |
| A. | High Power Amplifier |
| B. | Host Protected Area |
| C. | Hectopascal |
| D. | High Pressure Air |
| Answer» D. High Pressure Air | |
| 19. |
Antarctic ozone hole was caused by |
| A. | CFCs |
| B. | PAN |
| C. | CO₂ |
| D. | CO |
| Answer» B. PAN | |
| 20. |
Lifespan of 'CFCs' are: |
| A. | 900 years |
| B. | 3-600 years |
| C. | 1-200 years |
| D. | 3-600 years |
| Answer» D. 3-600 years | |
| 21. |
Isotopes are chemically identical forms of same element, but, having different |
| A. | Atomic Number |
| B. | Atomic weights |
| C. | Electronic Number |
| D. | Proton valancy |
| Answer» C. Electronic Number | |
| 22. |
Thermosphere is hottest layer of |
| A. | Atmosphere |
| B. | Biosphere |
| C. | Hydrosphere |
| D. | Mesosphere |
| Answer» B. Biosphere | |
| 23. |
12C isotop forms an ordinary oxygen, approximately |
| A. | 0.789 |
| B. | 0.989 |
| C. | 0.809 |
| D. | 0.909 |
| Answer» C. 0.809 | |
| 24. |
Size of 'plankton' is: |
| A. | four-thousandth of a millimetre |
| B. | three-thousandth of a millimetre |
| C. | one-thousandth of a millimetre |
| D. | Two-thousandth of a millimetre |
| Answer» D. Two-thousandth of a millimetre | |
| 25. |
'daisies' are sensitive to |
| A. | Temperature |
| B. | Heat |
| C. | Fire |
| D. | Pollution |
| Answer» B. Heat | |
| 26. |
'GWP' stands for |
| A. | Global Water Partnership |
| B. | Good Warehousig Practice |
| C. | Global warming potential |
| D. | Gentle wind project |
| Answer» D. Gentle wind project | |
| 27. |
Problem related to ozone depletion was discovered in |
| A. | 1990 |
| B. | 1985 |
| C. | 1970 |
| D. | 1980 |
| Answer» C. 1970 | |
| 28. |
In northern Canada increased temperature will tend to lengthen the |
| A. | Winters |
| B. | Pollution growth |
| C. | Growing period |
| D. | Humidity |
| Answer» D. Humidity | |
| 29. |
Loss of soil, Over extraction of groundwater, damaging from acid rain are examples of: |
| A. | Deforestation |
| B. | Environmental degradation |
| C. | Urbanization |
| D. | Global Warming |
| Answer» C. Urbanization | |
| 30. |
Almost, 6% of radiations from sun is scattered back to space by: |
| A. | Plants |
| B. | Radiations |
| C. | Atmospheric molecules |
| D. | Animals |
| Answer» D. Animals | |
| 31. |
Vulnerability, degree of a system, susceptible to adverse effects of |
| A. | Deforestation |
| B. | Climate change |
| C. | Urbanization |
| D. | Soil Erosion |
| Answer» C. Urbanization | |
| 32. |
Global warming potential of carbon dioxide is: |
| A. | 1.8 |
| B. | 2.2 |
| C. | 1.9 |
| D. | 1.2 |
| Answer» E. | |
| 33. |
How much of the world'd forest has been destroyed by the felling, burning and grazing? |
| A. | One third |
| B. | one fifth |
| C. | Two third |
| D. | four fifth |
| Answer» B. one fifth | |
| 34. |
Tropical 'cyclones' occur in: |
| A. | Poles |
| B. | Temperate regions |
| C. | Sub tropical regions |
| D. | Tropical regions |
| Answer» E. | |
| 35. |
About 60 percent of cutting tropical moist forests, working on prpose of: |
| A. | Food processing |
| B. | Industrial Pollution |
| C. | Agricultural Settlements |
| D. | All of above |
| Answer» D. All of above | |
| 36. |
Average hard warmer temperature, causes ocean water to |
| A. | Fall |
| B. | Rise |
| C. | Reduce |
| D. | Expand |
| Answer» E. | |
| 37. |
Sink is a process, which removes a greenhouse gas from the |
| A. | Oceans |
| B. | Biosphere |
| C. | Atmosphere |
| D. | plants |
| Answer» D. plants | |
| 38. |
Young Dryas was discovered by |
| A. | Qaulitative Data |
| B. | Quantitative Data |
| C. | Perenial data |
| D. | paleoclimatic data |
| Answer» E. | |
| 39. |
Celsius is a temperature scale, also known as: |
| A. | Barometer |
| B. | Centigrade scale |
| C. | Nenometer |
| D. | Micrometer |
| Answer» C. Nenometer | |
| 40. |
What causes global warming? |
| A. | Nitrogen |
| B. | Carbon dioxide |
| C. | Oxygen |
| D. | Argon |
| Answer» C. Oxygen | |
| 41. |
Radiation budget is breakdown of radiation, which enters and leaves the |
| A. | Air |
| B. | Hydrosphere |
| C. | Biosphere |
| D. | Earth's Atmosphere |
| Answer» E. | |
| 42. |
Ozone molecules are formed through action of: |
| A. | Ionization |
| B. | Chemical reaction |
| C. | ultraviolet radiation |
| D. | Hydrogen Bonding |
| Answer» D. Hydrogen Bonding | |
| 43. |
Greenhouse gases, having less than 1 percent quantity of the |
| A. | Atmosphere |
| B. | Hydrosphere |
| C. | Biosphere |
| D. | Troposphere |
| Answer» B. Hydrosphere | |
| 44. |
Planting of new forests on lands are known as: |
| A. | Tropical Forest |
| B. | Plantation |
| C. | Deforestation |
| D. | Afforestation |
| Answer» E. | |
| 45. |
Large amount of sulpher dioxide, transformed into |
| A. | Nitric Acid |
| B. | Sulphuric Acid |
| C. | Ozone |
| D. | CFCs |
| Answer» C. Ozone | |
| 46. |
Surface layers of water play a large part in the |
| A. | C cycle |
| B. | N cycle |
| C. | P cycle |
| D. | O cycle |
| Answer» B. N cycle | |
| 47. |
Some conifers require heat of fire to release their: |
| A. | Roots |
| B. | Fruits |
| C. | seeds |
| D. | Stems |
| Answer» D. Stems | |
| 48. |
'CFCs' are chemically inert, non toxic and insoluble in |
| A. | Solvents |
| B. | Air |
| C. | Water |
| D. | Solutes |
| Answer» D. Solutes | |
| 49. |
An increase in global temperature will lead to |
| A. | Global climate change |
| B. | Greenhouse gas emission |
| C. | Urbanization |
| D. | Deforestation |
| Answer» B. Greenhouse gas emission | |
| 50. |
Altitude of troposphere is approximately |
| A. | 18 to 40 km |
| B. | 20 to 30 km |
| C. | 10 to 15km |
| D. | 90 to 100 km |
| Answer» D. 90 to 100 km | |