MCQ Chapter 15 Our Environment Class 10 Science

Please refer to Our Environment MCQ Questions Class 10 Science below. These MCQ questions for Class 10 Science with answers have been designed as per the latest NCERT, CBSE books, and syllabus issued for the current academic year. These objective questions for Our Environment will help you to prepare for the exams and get more marks.

Our Environment MCQ Questions Class 10 Science

Please see solved MCQ Questions for Our Environment in Class 10 Science. All questions and answers have been prepared by expert faculty of standard 10 based on the latest examination guidelines.

MCQ Questions Class 10 Science Our Environment

Question: One organism may be the food for many organism will constitute the
(a) Food chain
(b) Food web
(c) food pyramid
(d) food trophic level   

Question: In an ecosystem , 10 % 0f energy available for transfer from one trophic level to the net is in the form of
(a) Heat energy
(b) Light energy
(c) Chemical energy
(d) mechanical energy 

Question: In a food chain , the first trophic level is always occupied by
(a) Carnivores
(b) Detritivores
(c) Herbivores
(d) Producers     

Question: Identify the biotic factors of an ecosystem from the following
(a) Temperature , rain fall , soil
(b) Plants , animals and microorganisms
(c) Temperature , microbes and rainfall
(d) plants , animals and soil   

Question: Food chain in an ecosystem is always
(a) Bi directional
(b) uni directional
(c) Multi directional
(d) no specific direction   

Question. Which group of organisms constitute food chain     
(a) grass, deer, lion, wolf
(b) plankton, grass hopper, fish, man
(c) grass, snake, tiger, wolf
(d) grass, grass hopper, tiger, wolf

Question. The element which is highly responsible for destruction of ozone molecule is         
(a) Fluorine
(b) Chlorine
(c) Methane
(d) Carbon

Question. Vultures in an ecosystem are
(a) predators
(b) scavengers
(c) consumers
(d) top carnivores

Question. In an ecosystem the
(a) primary producers are more than that of primary consumers
(b) secondary consumers are largest, because they are powerful
(c) primary consumers are out of number
(d) primary consumers are least dependent upon primary producers

Question. In an ecosystem the function of the produces is to
(a) convert organic compounds into inorganic compounds
(b) trap solar energy and convert in into chemical energy
(c) utilize chemical energy
(d) release energy

Question. In other to maintain proper ecological balance
(a) the existing forests should be cleared and new ones should be planted
(b) some quick growing annuals should be planted if a tree must be cut for other uses
(c) tree must be curt whenever necessary because the underground part performs the useful purpose
(d) a tree should be planted in place of one to be cut

Question. A biosphere is composed of
(a) living organisms
(b) living organisms and lithosphere
(c) living organisms, lithosphere and atmosphere
(d) living organisms, lithosphere, atmosphere and hydrosphere

Question. The importance of ecosystem lies in
(a) flow of energy
(b) cycling of materials
(c) both of the above
(d) none of the above

Question. Pyramid of energy in a forest ecosystem is
(a) always inverted
(b) always upright
(c) both upright and inverted
(d) first upright then inverted

Question. Ecosystem term was coined by
(a) Odum
(b) Mishra
(c) Reiter
(d) Tansley

Question. In which of the following trophic levels in any ecosystem the maximum energy is stored ?
(a) Producers
(b) Herbivores
(c) Carnivores
(d) Top carnivores

Question. Pyramids of biomass are
(a) upright or inverted
(b) always inverted
(c) mostly upright
(d) mostly inverted

Question. In the given food chain, suppose the amount of energy at fourth trophic leel is 2kJ, what will be the energy available at the producer level?     
(a) 2 kJ
(b) 20 kJ
(c) 200 kJ
(d) 2000 kJ

Question. Minimata a disease caused due to             
(a) land pollution
(b) Air pollution
(c) Bio magnification
(d) water pollution

Question. Non-biodegradable wastes can be disposed by         
(a) Decomposition
(b) throwing into water bodies
(c) buried under the soil
(d) Incineration

Question. The chemical which is mainly responsible for the depletion of ozone layer       
(a) AFC
(b) H₂S
(c) CFC
(d) CCl₄

Question. Food chain in an ecosystem is always     
(a) Bi directional
(b) uni directional
(c) Multi directional
(d) no specific direction

Question: In the given food chain, suppose the amount of energy at fourth trophic leel is 2kJ, what will be the energy available at the producer level?
(a) 2 kJ
(b) 20 kJ
(c) 200 kJ
(d) 2000 kJ   

Question: The limitation of number of trophic levels in a food chain is due to
(a) Sufficient food supply
(b) decrease in energy level at higher trophic level
(c) Increase in energy level at higher trophic level
(d) supply of water   

Question: What will happen if frog is missing in the food chain given below?
Grass →Grass hopper  → Frog   →Snake
(a) population of grass increases and grass hopper decreases
(b) Population of snake increases and grass hopper decreases
(c) Population of grass hopper increases and population of snake decreases
(d) population of grass hopper decreases and snake increases   

Question: Which group of organisms constitute food chain
(a) grass, deer, lion, wolf
(b) plankton, grass hopper, fish, man
(c) grass, snake, tiger, wolf
(d) grass, grass hopper, tiger, wolf   

Question: The percentage of solar radiation absorb by all the green plants for the process of
(a) 10 %
(b) 100%
(c) 9%
(d) 1 %     

Question: The accumulation of chemicals at various trophic levels in a food chain is known as
(a) Chemical magnification
(b) Physical magnification
(c) bio magnification
(d) Eutrophication 

In the following question, a statement of Assertion (A) is followed by a statement of Reason (R). Answer these questions by selecting appropriate option given below:
(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)
(c) Assertion (A) is true but Reason (R) is false.
(d) Assertion (A) is false but Reason (R) is true.

Question. Assertion (A): Herbivores are called first order consumers.   
Reason (R): Tiger is a top carnivore.

Question. Assertion (A): Ecology is study of relationship between living organisms and their environment.   
Reason (R): The biotic community and nonliving environment of an area function together to form an ecosystem.

Question. Assertion (A): A network of food chains existing together in an ecosystem is known as food web.   
Reason (R): An animal like kite cannot be a part of a food web.

Question. Assertion (A): Decomposers keep the environment clean.   
Reason (R): They recycle matter by breaking down the organic remains and waste products of plants and animals.

Question. Assertion (A): Animals adopt different strategies to survive in hostile environment.   
Reason (R): Praying mantis is green in colour which merges with plant foliage.