Environmental Science MCQ (Multiple Choice Question) - Schoolingaxis.com

Environmental Science MCQ (Multiple Choice Question)

 Que- What is lotic habitat? 

a. Standing or still water habitat  

b. Marine habitat  

c. Running water habitat 

d. Stagnant water 

Answer- Running water habitat 

Explanation-  Lotic refers to flowing water, from the Latin lotus, past participle of lavere, to wash. Lotic ecosystems can be contrasted with lentic ecosystems, which involve relatively still terrestrial waters such as lakes and ponds. Together, these two fields form the more general study area of freshwater or aquatic ecology.                     

Que- Which is the world's most deadliest snake? 

a. Black mamba 

b. Spitting cobra 

c. Russel viper 

d. Anaconda 

Answer- Black mamba 

Explanation-  Black mamba is the world's most deadliest snake.                     

Que- _________ is the most commonly used unit of radiation 

a. Becquerel 

b. Gray 

c. Rutherford 

d. Curie  

Answer- Curie  

Explanation-  The units of measure for radioactivity are the curie (Ci) and becquerel (Bq). Exposure describes the amount of radiation traveling through the air. Many radiation monitors measure exposure. The units for exposure are the roentgen (R) and coulomb/kilogram (C/kg).                     

Que- Which of the following rock types would most likely be the best oil reservoir? 

a. Granite 

b. Shale 

c. Sandstone 

d. Salt  

Answer- Sandstone 

Explanation-  Sandstone would most likely be the best oil reservoir.                     

Que- Trophic levels are formed by 

a. Only plants 

b. only animals 

c. Only carnivorous 

d. Organisms linked in food chain 

Answer- Organisms linked in food chain 

Explanation-  Trophic levels in a food chain are formed by producers, consumers and decomposers. In the given food chain, plants are producers. The animals eating plants are called as primary consumers and animals eating primary consumers are called as secondary consumers.                     

Que- The drug morphine is extracted from _______ plant. 

a. Cocoa  

b. Belladonna  

c. Opium Poppy  

d. Tannin 

Answer- Opium Poppy  

Explanation-  The drug morphine is extracted from Opium Poppy plant.                     

Que- Producers are otherwise known as   

a. Organisms 

b. Manufacturers 

c. Organic compounds 

d. Autotrophs  

Answer- Autotrophs  

Explanation-  Producers are organisms that make their own food; they are also known as autotrophs. They get energy from chemicals or the sun, and with the help of water, convert that energy into usable energy in the form of sugar, or food. The most common example of a producer are plants.                     

Que- Decomposers are otherwise called as   

a. Detritivores 

b. Primary consumers 

c. Organic matter 

d. Secondary consumers 

Answer- Detritivores 

Explanation-  Decomposers are otherwise called as detritivores.                       

Que- The pollution which does not persistent harm to life supporting system is 

a. Noise pollution 

b. Radiation pollution 

c. Organochlorine pollution 

d. All of these 

Answer- Noise pollution 

Explanation-  The pollution which does not persistent harm to life supporting system is noise pollution.                     

Que- Which country contains about 50% of the world's coal resources? 

a. United States 

b. China 

c. Canada 

d. The former Soviet Union  

Answer- The former Soviet Union  

Explanation- No explanation is given for this question  

Que- What is Carcinogen? 

a. Drugs for curing infectious disease  

b. Drugs used for curing cancer  

c. Cancer causing agent  

d. Food colourants 

Answer- Cancer causing agent  

Explanation-  A carcinogen is any substance, radionuclide, or radiation that promotes carcinogenesis, the formation of cancer. This may be due to the ability to damage the genome or to the disruption of cellular metabolic processes.                     

Que- The Term Smog was introduced in 1905 by   

a. Des Voeux 

b. Hult 

c. Canon 

d. Le Chatelier  

Answer- Des Voeux 

Explanation-  Des Voeux coined the term smog in 1905 to describe the condition of fog which has smoke in it. C. J.F.                     

Que- The gas that absorbs most of the harmful ultraviolet radiation in the stratosphere: 

a. Water vapor 

b. Nitrous oxide 

c. Carbon dioxide 

d. Ozone 

Answer- Ozone 

Explanation-  Ozone absorbs ultraviolet radiation but lets other types of radiation, such as visible light, pass through. Molecules of ozone absorb ultraviolet radiation. The ozone gas throughout the stratosphere is called the ozone layer. It absorbs harmful ultraviolet radiation from the Sun.                     

Que- Atmospheric ozone layer which protect us from UV-B and C is getting depleted most by addition of 

a. chlorofluorocarbon 

b. carbon monoxide 

c. carbon dioxide 

d. sulpur dioxide  

Answer- chlorofluorocarbon 

Explanation-  Atmospheric ozone layer which protect us from UV-B and C is getting depleted most by addition of chlorofluorocarbon.                     

Que- Plants which grow in shade are called 

a. Sciophytes  

b. Heliophytes  

c. Oxylophytes  

d. Epiphytes 

Answer- Sciophytes  

Explanation-  Plants growing in bright light are called as sun plants or heliophytes, while plants growing in partial shade or low light intensity are called as shade plants or sciophytes.                     

Que- Plants which grow in light are called 

a. Sciophytes  

b. Heliophytes  

c. Oxylophytes  

d. Epiphytes 

Answer- Heliophytes  

Explanation-  Plants which grow in light are called Heliophytes.                     

Que- What is the man-made greenhouse gas known as? 

a. Carbon dioxide 

b. HFC 

c. Ozone 

d. Water Vapour  

Answer- HFC 

Explanation-  Many greenhouse gases occur naturally in the atmosphere, such as carbon dioxide, methane, water vapor, and nitrous oxide, while others are synthetic. Those that are man-made include the chlorofluorocarbons (CFCs), hydrofluorocarbons (HFCs) and Perfluorocarbons (PFCs), as well as sulfur hexafluoride (SF6).                     

Que- Which of the following is not a green house gas? 

a. Carbon dioxide 

b. Methane 

c. Ozone 

d. SF6 

Answer- SF6 

Explanation-  The principal greenhouse gases (GHGs) are carbon dioxide (CO2), water vapour (H2O), nitrous oxide (N2O), methane (CH4) and ozone (O3).                     

Que- The gas responsible for the greenhouse effect on Venus is: 

a. Carbon dioxide (CO2) 

b. Oxygen (O2) 

c. Ozone (O3) 

d. Nitrogen (N2) 

Answer- Carbon dioxide (CO2) 

Explanation-  The Venusian atmosphere is mainly made up of carbon dioxide, a greenhouse gas. On Earth, carbon dioxide makes up only a tiny fraction of the atmosphere. However, man-made emissions have caused carbon dioxide concentrations here to increase by about 30% since pre-industrial times.                     

Que- Fog that most often forms as warm rain falls into a cold layer of surface air is called: 

a. Radiation fog 

b. Evaporation (mixing) fog 

c. Advection fog 

d. Upslope fog 

Answer- Evaporation (mixing) fog 

Explanation-  Freezing fog, which deposits rime, is composed of droplets of supercooled water that freeze to surfaces on contact.Precipitation fog (or frontal fog) forms as precipitation falls into drier air below the cloud, the liquid droplets evaporate into water vapor.                     

Que- Fine organic or inorganic particles suspended in air is called 

a. particulate pollutant 

b. gaseous pollutant 

c. aerosol 

d. none of these 

Answer- aerosol 

Explanation-  Fine organic or inorganic particles suspended in air is called as aerosol particulate matter. It consists of soot, flash, and dust of various types, fur, hair, spores etc. It is classified into settleable and suspended particulate matter.                     

Que- CFCs are used as   

a. refrigerants 

b. insulators 

c. aerosol propellants 

d. all the above  

Answer- all the above  

Explanation-  Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.                      

Que- Ramsar Convention refers to the conservation of ____________ 

a. Deserts  

b. Wetlands  

c. Agriculture lands,  

d. Forest land 

Answer- Wetlands  

Explanation-  The Ramsar Convention on Wetlands of International Importance especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of wetlands.It is also known as the Convention on Wetlands. It is named after the city of Ramsar in Iran, where the Convention was signed in 1971.                     

Que- The earth's atmosphere is divided into layers based on the vertical profile of: 

a. Air pressure 

b. Air temperature 

c. Air density 

d. Wind speed 

Answer- Air temperature 

Explanation-  The term upper atmosphere usually refers to the region of the atmosphere above the troposphere. Many remote sensing satellites follow the near polar sun-synchronous orbits at a height around 800 km, which is well above the thermopause.                     

Que- BOD of a river water is found very high. This means water 

a. is clear  

b. is highly polluted  

c. contain Algae  

d. contain many dissolved minerals 

Answer- is highly polluted  

Explanation-  BOD (Biological Oxygen Demand or Biochemical Oxygen Demand) is the amount of dissolved oxygen, expressed in milligrams of oxygen per liter of water, consumed by micro-organisms to decompose the organic matter present in water.     

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