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Ecosystem mcq. We covered all the Ecosystem mcq in this post for free so that you can practice well for the exam.
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mcq on Ecosystem for Students
Why is carbon monoxide considered a harmful pollutant?
(a) It combines with oxygen
(b) It stops the process of glycolysis
(c) It binds to hemoglobin
(d) It affects the nervous system
Option c – It binds to hemoglobin
Which of the following is not a proper method of waste disposal?
(a) Burying waste in landfills
(b) Disposing surgical tools by dumping them in fields
(c) Using composting to create humus
(d) Releasing waste into large water bodies like seas
Option b – Disposing surgical tools by dumping them in fields
Which natural process is responsible for disturbing the balance in the Environment?
(a) Expansion of cities
(b) Wild Forest fires
(c) Planting more trees
(d) Rapid Population growth
Option b – Wild Forest fires
Which of the following does not result from the greenhouse effect?
(a) Increased formation of glaciers in mountainous areas
(b) Planting more trees
(c) Greater chances of natural disasters like floods and cyclones
(d) Increased vulnerability to diseases
Option b – Planting more trees
What Acid or Acids are commonly present in Acid rain?
(a) Sulfuric Acid
(b) Nitric Acid
(c) Hydrochloric Acid
(d) Both sulfuric and nitric Acids
Option d – Both sulfuric and nitric Acids
Which one of the following is not typically an effect of Acid rain?
(a) Erosion of outdoor stone monuments like the Taj Mahal
(b) Harm to aquatic life due to acidic water
(c) Damage to interior walls and flooring of houses
(d) Reduced crop production and plant growth
Option c – Damage to interior walls and flooring of houses
What unit is used to measure the concentration of ozone in the Atmosphere?
(a) Dobson unit
(b) Decibel
(c) Millimeters of mercury
(d) None of these
Option a – Dobson unit
What happens when fruit peels and vegetable waste are discarded in a park?
(a) They pollute the soil
(b) They convert into humus, enriching the soil
(c) They are decomposed by microorganisms
(d) Both b and c
Option d – Both b and c
What Disease occurred in Japan due to mercury accumulation in fish?
(a) Heart and vascular disorders
(b) Minamata Disease
(c) Cancer
(d) Formation of malignant tumors
Option b – Minamata Disease
What does carbon dioxide trap when it is released into the Atmosphere?
(a) Ozone
(b) Heat
(c) UV radiation
(d) Smog
Option b – Heat
Which of the following is among the most harmful non-biodegradable wastes?
(a) Cow dung
(b) Plastic materials
(c) Household trash
(d) Radioactive substances
Option d – Radioactive substances
What is the result of the ozone layer getting thinner?
(a) More sunlight reaches the Earth
(b) Increased penetration of UV rays
(c) Both a and b
(d) None of the above
Option c – Both a and b
What materials are typically collected by rag pickers?
(a) Plastics, paper, polythene, and Metals
(b) Rags, cardboard, and glass
(c) Both a and b
(d) Leftover Food items
Option c – Both a and b
Which international body is responsible for initiating environmental protection programs?
(a) World Health Organization
(b) United Nations Development Programme
(c) United Nations Environment Programme
(d) United Nations Children’s Fund
Option c – United Nations Environment Programme
What could be a consequence of cutting down trees in large numbers?
(a) Increase in rainfall
(b) Reduction in rainfall
(c) Drop in temperature
(d) Nutrient preservation in soil
Option b – Reduction in rainfall
Which one of the following qualifies as biodegradable waste?
(a) Nuclear waste
(b) Used aluminum cans
(c) DDT pesticide
(d) Animal dung
Option d – Animal dung
How can we help maintain a healthy balance in the ecosystem?
(a) Clear existing forests and replant trees elsewhere
(b) Use fast-growing plants as substitutes when cutting trees
(c) Cut trees as needed because roots remain useful
(d) Plant a new tree for every tree that is removed
Option d – Plant a new tree for every tree that is removed
Why is the ozone layer vital for life on Earth?
(a) It blocks infrared rays
(b) It blocks Heat from the sun
(c) It blocks general Solar radiation
(d) It absorbs ultraviolet radiation
Option d – It absorbs ultraviolet radiation
What can city garbage be converted into?
(a) Sludge from sewage
(b) Reusable items
(c) Biogas and Organic fertilizer
(d) All of the above
Option c – Biogas and Organic fertilizer
What should not be added to a compost pit?
(a) Vegetable waste and disposable paper cups
(b) Worms that help in composting
(c) Leaves and dried plants
(d) Plastic flowers and glass decorations
Option d – Plastic flowers and glass decorations
Why does the amount of pesticide increase as we move up the Food chain?
(a) Due to bio-absorption
(b) Due to bio-translocation
(c) Due to bio-magnification
(d) Due to bio-multiplication
Option c – Due to bio-magnification
Which atmospheric layer protects the Earth from harmful ultraviolet rays?
(a) Stratosphere
(b) Ozonosphere
(c) Troposphere
(d) Ionosphere
Option d – Ionosphere
Which of these combinations includes only non-biodegradable items?
(a) Wood, leather, and paper
(b) Polythene, synthetic detergent, and PVC
(c) Plastic, detergent, and grass
(d) Plastic, bakelite, and DDT
Option d – Plastic, bakelite, and DDT
What does the term “ozone hole” refer to?
(a) A physical hole in the stratosphere
(b) Constant ozone concentration
(c) A decline in ozone levels
(d) A rise in ozone concentration
Option c – A decline in ozone levels
We covered all the ecosystem mcq above in this post for free so that you can practice well for the exam.
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