Our Environment MCQ Questions for Class 10 Science Chapter 15 with Answers

NCERTCOURSE.COM- Find here the NCERT/CBSE chapter-wise Multiple Choice Questions from Class 10 Science book Chapter 15 Our Environment with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Our Environment. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

MCQ Questions for Class 10 Science with Answers Biology

Q1. The depletion of the ozone layer causes

(i) global wanning
(ii) earthquakes
(iii) increased UV radiations
(iv) acid rain

(iii) increased UV radiations

Q2. In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of

(i) heat energy
(ii) light energy
(iii) chemical energy
(iv) mechanical energy

(iii) chemical energy

Q3. Which of the following is not a terrestrial ecosystem-

(i) forest
(ii) desert
(iii) aquarium
(iv) grassland

(iii) aquarium

Q4. Which of the following limits the number of trophic levels in a food chain?

(i) water
(ii) polluted air
(iii) deficient food supply
(iv) decrease in energy at higher trophic levels

(iv) decrease in energy at higher trophic levels

Q5. In a food chain, the third trophic level is always occupied by

(i) herbivore
(ii) carnivore
(iii) decomposer
(iv) producer

(ii) carnivore

Q6. An ecosystem includes

(i) all living organisms
(ii) non-living objects
(iii) both living organisms and non-living objects
(iv) sometimes living organisms and sometimes non-living objects

(iii) both living organisms and non-living objects

Q7. Which of the following is an abiotic component of an ecosystem?

(i) Humus
(ii) Bacteria
(iii) Plants
(iv) Fungi

(i) Humus

Q8. A food chain always starts with

(i) respiration
(ii) photosynthesis
(iii) decay
(iv) nitrogen fixation

(ii) photosynthesis

Q9. Which of the following chemicals causes depletion of the ozone layer?

(i) Carbon tetrachloride
(ii) Methane
(iii) Chloro fluoro carbon
(iv) Carbon monoxide

(iii) Chloro fluoro carbon

Q10. Which of the following is the best way for disposal of vegetable and fruit peels?

(i) Landfill
(ii) Recycling
(iii) Composting
(iv) Burning

(iii) Composting

Q11. The second trophic level is always of-

(i) herbivores
(ii) autotrophs
(iii) carnivores
(iii) producers

(i) herbivores

Q12. Ozone layer is damaged by-

(i) methane
(ii) carbon-dioxide
(iii) Sulphur-dioxide
(iv) CFCs

(iv) CFCs

Q13. Which of the following is biodegradable?

(i) Aluminium can
(ii) Polythene bag
(iii) Cowdung
(iv) DDT

(iii) Cowdung

Q14. Which of the two sets belong to the same trophic level?

(i) Rabbit: Tiger
(ii) Vulture : Rat
(iii) Grasshopper : Hawk
(iv) Frog : Lizard

(iv) Frog : Lizard

Q15. In natural ecosystems, decomposers include-

(i) only bacteria and fungi
(ii) only microscopic animals
(iii) herbivores and carnivores
(iv) both (ii) and (iii)

(i) only bacteria and fungi

Q16. In an ecosystem, herbivores represent

(i) producers
(ii) primary consumers
(iii) secondary consumers
(iv) decomposers

(ii) primary consumers

Q17. Which one of the following is an artificial ecosystem?

(i) Lake
(ii) Forest
(iii) Pond
(iv) Crop field

(iv) Crop field

Q18. Which of these organisms are the most important decomposers in an ecosystem?

(i) Algae and fungi
(ii) Fungi and bacteria
(iii) Algae and bacteria
(iv) Bacteria and virus

(ii) Fungi and bacteria

Q19. Which of the two in the following sets belong to the same trophic level?

(i) Grass : Grasshopper
(ii) Goat : Spider
(iii) Hawk : Rat
(iv) Frog : Lizard

(iv) Frog : Lizard

Q20. Which one of the following will undergo fastest bio-degradation?

(i) Mango seed
(ii) Wood
(iii) Mango peel
(iv) Mango pulp

(iv) Mango pulp

Q21. In the given foodchain if the amount of energy at the fourth trophic level is 4 kJ, what will be the energy available at the producer level?
Grass → Grasshopper → Frog → Snake

(i) 4 kJ
(ii) 40 kJ
(iii) 400 kJ
(iv) 4000 kJ

(iv) 4000 kJ

Q22. Which of these is a greenhouse gas?

(i) Hydrogen sulphide
(ii) Methane
(iii) Ozone
(iv) Carbon monoxide

(ii) Methane

Q23. Flow of energy in an ecosystem is always-

(i) unidirectional
(ii) bidirectional
(iii) multidirectional
(iv) no specific direction.

(i) unidirectional

Q24. Which of the following is not a terrestrial ecosystem-

(i) forest
(ii) desert
(iii) aquarium
(iv) grassland

(iii) aquarium

I Think the given NCERT MCQ Questions for class 10 Science book Chapter 15 Our Environment with Answers Pdf free download will assist you. If you’ve got any queries regarding CBSE Class 10 Science Our Environment MCQs Multiple Choice Questions with Answers, drop a comment below and that we will come back to you soon.

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