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

Check the below NCERT MCQ Questions for Class 10 Science Chapter 15 Our Environment with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided Our Environment Class 10 Science MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-10-science-chapter-15/

You can refer to NCERT Solutions for Class 10 Science Chapter 15 Our Environment to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Our Environment Class 10 MCQs Questions with Answers

Our Environment Class 10 MCQ Question 1.
Which of the following is biodegradable waste?
(a) DDT
(b) Aluminium can
(c) Plastic bag
(d) Cow dung

Answer

Answer: (d) Cow dung


Class 10 Science Chapter 15 MCQ Question 2.
Which of the two sets belong to the same trophic level?
(a) Rabbit: Tiger
(b) Vulture : Rat
(c) Grasshopper : Hawk
(d) Frog : Lizard

Answer

Answer: (d) Frog : Lizard


Our Environment Class 10 MCQ With Answers Question 3.
In a given food chain if the amount of energy at the fourth trophic level is 6 kJ, what will be the energy available at the producer level?
(a) 6000 kJ
(b) 20 kJ
(c) 60 kJ
(d) 600 kJ

Answer

Answer: (a) 6000 kJ


Our Environment MCQ Class 10 Question 4.
Which of the following is the best way for disposal of vegetable and fruit peels?
(a) Landfill
(b) Recycling
(c) Composting
(d) Burning

Answer

Answer: (c) Composting


Ch 15 Science Class 10 MCQ Question 5.
The problem caused due to ozone hole is
(a) earthquakes
(b) damage due to UV radiations
(c) chemical pollution
(d) acid rain

Answer

Answer: (b) damage due to UV radiations


MCQ On Our Environment Class 10 Question 6.
An ecosystem includes
(a) all living organisms
(b) non-living objects
(c) both living organisms and non-living objects
(d) sometimes living organisms and sometimes non-living objects

Answer

Answer: (c) both living organisms and non-living objects


Class 10 Our Environment MCQ Question 7.
Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as
(a) eutrophication
(b) pollution
(c) biomagnification
(d) accumulation

Answer

Answer: (c) biomagnification


MCQ Of Our Environment Class 10 Question 8.
In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of
(a) heat energy
(b) light energy
(c) chemical energy
(d) mechanical energy

Answer

Answer: (c) chemical energy


Class 10 Science Ch 15 MCQ Question 9.
Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called
(a) decomposers
(b) producers
(c) herbivores
(d) carnivores

Answer

Answer: (b) producers


Chapter 15 Class 10 Science MCQ Question 10.
Excessive exposure of humans to UV-rays results in
(i) damage to immune system
(ii) damage to lungs
(iii) skin cancer
(iv) peptic ulcers
(a) (i) and (ii)
(b) (ii) and (iv)
(c) (i) and (iii)
(d) (iii) and (iv)

Answer

Answer: (c) (i) and (iii)


Chapter 15 Science Class 10 MCQ Question 11.
Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the
(a) food web
(b) ecological pyramid
(c) ecosystem
(d) food chain

Answer

Answer: (a) food web


Environment Class 10 MCQ Question 12.
In the given Figure the various trophic levels are shown in a pyramid. At which trophic level is maximum energy available?
Chapter 15 Class 10 Science MCQ
(a) T4
(b) T2
(c) T1
(d) T3

Answer

Answer: (c) T1


Class 10 Chapter 15 MCQ Science Question 13.
Which group of organisms are not the constituents of a food chain?
(i) Grass, lion, rabbit, wolf
(ii) Plankton, man, fish, grasshopper
(iii) Wolf, grass, snake, tiger
(iv) Frog, snake, eagle, grass, grasshopper
(a) (i) and (iii)
(b) (iii) and (iv)
(c) (ii) and (iii)
(d) (i) and (iv)

Answer

Answer: (c) (ii) and (iii)


Class 10 Science Chapter 15 MCQ Online Test Question 14.
The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about
(a) 1%
(b) 5%
(c) 8%
(d) 10%

Answer

Answer: (a) 1%


MCQ Of Chapter 15 Science Class 10 Question 15.
Which of the statements is incorrect?
(а) All green plants and blue green algae are producers
(b) Green plants get their food from organic compounds
(c) Producers prepare their own food from inorganic compounds
(d) Plants convert solar energy into chemical energy

Answer

Answer: (b) Green plants get their food from organic compounds


Question 16.
The decomposers in an ecosystem
(a) convert inorganic material, to simpler forms
(b) convert organic material to inorganic forms
(c) convert inorganic materials into organic compounds
(d) do not breakdown organic compounds

Answer

Answer: (b) convert organic material to inorganic forms


Question 17.
Disposable plastic plates should not be used because
(а) they are made of materials with light weight
(b) they are made of toxic materials
(c) they are made of biodegradable materials
(d) they are made of non-biodegradable materials

Answer

Answer: (d) they are made of non-biodegradable materials


Question 18.
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
(а) The population of tiger increases
(b) The population of grass decreases
(c) Tiger will start eating grass
(d) The population of tiger decreases and the population of grass increases

Answer

Answer: (d) The population of tiger decreases and the population of grass increases


Question 19.
When is the world environment day celebrated?
(a) 16 June
(b) 5 December
(c) 5 June
(d) 5 July

Answer

Answer: (c) 5 June


Question 20.
Which of these is a greenhouse gas?
(a) Hydrogen sulphide
(b) Methane
(c) Ozone
(d) Carbon monoxide

Answer

Answer: (b) Methane


Question 21.
The transfer of energy in a food chain is always:
(a) Unidirectional
(b) Methane
(c) Bi-directional
(d) Random

Answer

Answer: (a) Unidirectional


Question 22.
Which of these organisms are the most important decomposers in an ecosystem?
(a) Algae and fungi
(b) Fungi and bacteria
(c) Algae and bacteria
(d) Bacteria and virus

Answer

Answer: (b) Fungi and bacteria


Question 23.
Which of these does not belong to biotic component?
(a) Parasites
(b) Fungi
(c) Bacteria
(d) Soil

Answer

Answer: (d) Soil


Fill in the blanks

1. Biodegradable materials persist in the environment as they have a ……………. nature.

Answer

Answer: Inert


2. Gardens and crop-fields are ……………. type of ecosystems.

Answer

Answer: artificial


3. The amount of energy transferred from a trophic level to the next trophic level is only …………….

Answer

Answer: 10%


4. Growth, reproduction etc. of living organisms are affected by the ……………. components of ecosystem.

Answer

Answer: abiotic


5. All consumers are directly or indirectly dependent on ……………. for their energy requirements.

Answer

Answer: producers


6. A network of food chains is called a …………….

Answer

Answer: food web


7. There is always a ……………. flow of energy in a food chain.

Answer

Answer: unidirectional


8. The increase in concentration of harmful chemicals at successive trophic levels is called …………….

Answer

Answer: biomagnifications


9. Ozone shields the surface of the Earth from ……………. radiation the sun.

Answer

Answer: ultraviolet (UV)


10. Forests, ponds and lakes are examples of ……………. type of ecosystems.

Answer

Answer: natural


Match the following columns

Column I Column II
(i) Parasites (a) Abiotic
(ii) Crop field (b) bio-degradable
(iii) Synthetic foam (c) Biotic
(iv) pH (d) Artificial ecosystem
(v) Forests (e) Decomposers
(iv) DDT (f) Scavengers
(vii) Wood (g) Natural ecosystem
(viii) Fungi (h) Biomagnification
(ix) Vulture (i) Non-biodegradable
Answer

Answer:

Column I Column II
(i) Parasites (c) Biotic
(ii) Crop field (d) Artificial ecosystem
(iii) Synthetic foam (a) Abiotic
(iv) pH (h) Biomagnification
(v) Forests (g) Natural ecosystem
(iv) DDT (i) Non-biodegradable
(vii) Wood (b) bio-degradable
(viii) Fungi (e) Decomposers
(ix) Vulture (f) Scavengers

Complete the crossword given below.

MCQ Questions for Class 10 Science Chapter 15 Our Environment with Answers
Across
4. These are the chemicals used to kill the pests [9]
7. A top carnivore [4]
8. A primary consumer [4]
9. Bacteria do this to the biodegradable waste [9]
10. Protects us from UV rays [5]
Down
1. Vulture is this type of animal [9]
2. Temperature and soil are these kinds of component of ecosystem [7]
3. Predators and parasites belong to this component of ecosystem [6]
5. Term used for a biological community of interacting organisms and their physical environment [9]
6. All living things need it to function [6]

Answer

Answer:
Across:
4. Particide
7. Lion
8. Goat
9. Decompose
10. Ozone

Down:
1. Scavenger
2. Abiotic
3. Biotic
5. Pesticides
6. Energy


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