Our Environment Class 10 Science MCQ Quiz – Test Your Knowledge

Are you ready to test your knowledge of Our Environment? This chapter focuses on ecosystem components, food chains, trophic levels, ozone layer depletion, and waste management—important topics for your CBSE Class 10 Science exam.

About the Quiz

Chapter Name: Our Environment
Subject: Science (Biology)
Book: NCERT Class 10 Science
Question Type: Multiple Choice Questions (MCQs)
Leaderboard: Yes (Compete with Others!)

Why Take This Quiz?

✔ Helps in quick revision for board exams
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Chapter 13 - Our Environment

1 / 15

Assertion: A greater number of individuals are present in lower trophic levels.

Reason: The flow of energy is unidirectional.

A is false, but R is true.

A is true, but R is false.

Both A and R are true, and R is the correct explanation of the assertion.

Both A and R are true, but R is not the correct explanation of the assertion.

2 / 15

The given figure best represents:

Food chain in pond, forest, and grassland

Food chain in forest, grassland, and pond

Food chain in forest, pond, and grassland

Food chain in grassland, pond, and forest

3 / 15

Matter and energy are two fundamental inputs of an ecosystem. Movement of

Energy is bidirectional and the matter is repeatedly circulating

Energy is repeatedly circulation and the matter is unidirectional

Energy is multidirectional and the matter is bidirectional

Energy is unidirectional and the matter is repeatedly circulating

4 / 15

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

Polluted air

Decrease in energy at higher trophic levels

Water

Less availability of food

5 / 15

If a deer is eaten by a tiger, then the energy transfer will be from

Producer to decomposer

Primary consumer to secondary consumer

Producer to primary consumer

Secondary consumer to environment

6 / 15

The decomposers are not included in the food chain. The correct reason for the same is because decomposers:

Release enzymes outside their body to convert organic material to inorganic forms

Convert organic material to inorganic forms

Do not break down organic compounds

Act at every trophic level of the food chain

7 / 15

Assertion: Biodegradable substances result in the formation of compost and natural replenishment.

Reason: It is due to the breakdown of complex inorganic substances into simple organic substances.

A is false but R is true.

Both A and R are true, and R is not the correct explanation of A.

Both A and R are true, and R is the correct explanation of A.

A is true but R is false.

8 / 15

If Ravi is consuming curd/yogurt for lunch, which trophic level in a food chain he should be considered as occupying?

Second trophic level

Third trophic level

Fourth trophic level

First trophic level

9 / 15

The chemicals that are non-degradable, get progressively accumulated at each trophic level, and their concentration is seen maximum in the bodies of top consumers. This phenomenon is known as:

Accumulation

Biomagnification

Pollution

Eutrophication

10 / 15

Assertion: The food chain is responsible for the entry of harmful chemicals into our bodies.

Reason: The length and complexity of food chains vary greatly.

A is true, but R is false.

Both A and R are true, but R is not the correct explanation of the assertion.

Both A and R are true, and R is the correct explanation of the assertion.

A is false, but R is true.

11 / 15

In the food web, what two organisms are competing for food?

B and D

D and F

A and C

A and B

12 / 15

If 10,000 J solar energy falls on green plants in a terrestrial ecosystem, what percentage of solar energy will be converted into food energy?

10,000 J

100 J

It will depend on the type of the terrestrial plant

1000 J

13 / 15

Which of the following organisms convert organic material to inorganic forms?

Carnivores

Herbivores

Decomposers

Producers

14 / 15

Observe the food web and answer the questions given below:

The mussel can be described as

Secondary consumer

Decomposer

Producers

Primary consumer

15 / 15

Why do all food chains start with plants?

Because plants are easily grown

Because plants do not require energy

Because plants are nutritious

Because plants can produce their own energy

Your score is

The average score is 60%

Leaderboard – Top Scorers

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Pos.	Name	Score	Duration	Points
1	Priya	100 %	1 minutes 10 seconds	15
2	Abhinav	100 %	1 minutes 23 seconds	15
3	Sa	100 %	1 minutes 26 seconds	15
4	Varun	100 %	1 minutes 37 seconds	15
5	Priya Singh	100 %	1 minutes 42 seconds	15
6	Priya Singh	100 %	1 minutes 47 seconds	15
7	varun	100 %	1 minutes 47 seconds	15
8	Nirun	100 %	1 minutes 51 seconds	15
9	Anmol	100 %	2 minutes 2 seconds	15
10	Manu Manvith	100 %	2 minutes 5 seconds	15
11	Veer	100 %	2 minutes 9 seconds	15
12	,,,,	100 %	2 minutes 10 seconds	15
13	Manvith	100 %	3 minutes 1 seconds	15
14	Shree	100 %	3 minutes 23 seconds	15
15	Pritha	100 %	3 minutes 33 seconds	15
16	vinay	100 %	4 minutes 59 seconds	15
17	varun	100 %	5 minutes 38 seconds	15
18	Priya Singh	100 %	8 minutes 17 seconds	15
19	Akarsh	93 %	1 minutes 30 seconds	14
20	Vivian	93 %	1 minutes 35 seconds	14
21	Priya	93 %	2 minutes 8 seconds	14
22	Varun	93 %	2 minutes 8 seconds	14
23	Priya Singh	93 %	2 minutes 12 seconds	14
24	Priya Singh	93 %	2 minutes 25 seconds	14
25	Ashish	93 %	2 minutes 34 seconds	14
26	/	93 %	2 minutes 37 seconds	14
27	Judith	93 %	2 minutes 46 seconds	14
28	Nirun	93 %	2 minutes 46 seconds	14
29	Mahi	93 %	2 minutes 52 seconds	14
30	Harshita	93 %	3 minutes 11 seconds	14
31	.	93 %	3 minutes 22 seconds	14
32	Gaurav	93 %	5 minutes 19 seconds	14
33	Priya Singh	93 %	7 minutes 1 seconds	14
34	Sivangi	93 %	10 minutes 51 seconds	14
35	Iqra Nafees	93 %	12 minutes 20 seconds	14
36	varun	93 %	31 minutes 21 seconds	14
37	Jkl	87 %	1 minutes 39 seconds	13
38	Hi	87 %	1 minutes 57 seconds	13
39	Shabby	87 %	2 minutes 8 seconds	13
40	Amal Roshna	87 %	2 minutes 9 seconds	13
41	Soumya	87 %	2 minutes 15 seconds	13
42	Anaya	87 %	2 minutes 45 seconds	13
43	Varun	87 %	3 minutes	13
44	.	87 %	3 minutes 11 seconds	13
45	Kajal	87 %	3 minutes 16 seconds	13
46	Cc	87 %	3 minutes 18 seconds	13
47	Anushka	87 %	3 minutes 19 seconds	13
48	Anmol	87 %	3 minutes 22 seconds	13
49	golu chaudhry	87 %	3 minutes 24 seconds	13
50	A	87 %	3 minutes 56 seconds	13
51	Anu	87 %	3 minutes 58 seconds	13
52	Praveen	87 %	4 minutes 11 seconds	13
53	Abhishek Kumar	87 %	4 minutes 15 seconds	13
54	Judith	87 %	4 minutes 46 seconds	13
55	Shalu	87 %	4 minutes 52 seconds	13
56	M	87 %	5 minutes 36 seconds	13
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58	gfyfyt	87 %	5 minutes 57 seconds	13
59	Harahul	87 %	6 minutes 26 seconds	13
60	H	87 %	8 minutes 11 seconds	13
61	akki	87 %	17 minutes 41 seconds	13
62	Akarsh	80 %	1 minutes 23 seconds	12
63	Shreyansh Singh	80 %	1 minutes 32 seconds	12
64	Akarsh	80 %	1 minutes 40 seconds	12
65	Shreyansh Singh	80 %	2 minutes 17 seconds	12
66	Pritha	80 %	2 minutes 41 seconds	12
67	Shreya R Gowda	80 %	3 minutes 14 seconds	12
68	Aakriti	80 %	3 minutes 15 seconds	12
69	pakhee	80 %	3 minutes 18 seconds	12
70	Siva	80 %	3 minutes 31 seconds	12
71	Vinayak	80 %	3 minutes 49 seconds	12
72	ARR	80 %	3 minutes 58 seconds	12
73	Dj	80 %	4 minutes 2 seconds	12
74	Trinay	80 %	4 minutes 2 seconds	12
75	Hariharan	80 %	4 minutes 30 seconds	12
76	Veronica	80 %	4 minutes 31 seconds	12
77	Anishpanday	80 %	5 minutes 5 seconds	12
78	Maliha	80 %	5 minutes 49 seconds	12
79	Ari	80 %	7 minutes 23 seconds	12
80	Raj	80 %	7 minutes 27 seconds	12
81	Ssdddf	80 %	8 minutes 34 seconds	12
82	Rishith	80 %	9 minutes 4 seconds	12
83	Abhinav Singh	80 %	9 minutes 17 seconds	12
84	Sonam	80 %	16 minutes 39 seconds	12
85	De	80 %	1 hours 49 minutes 4 seconds	12
86	Manvi	73 %	1 minutes 26 seconds	11
87	Sri	73 %	1 minutes 44 seconds	11
88	Namrta	73 %	1 minutes 52 seconds	11
89	Rv	73 %	1 minutes 52 seconds	11
90	Ashish	73 %	2 minutes 1 seconds	11
91	Vighneshwari	73 %	2 minutes 10 seconds	11
92	Vcvj	73 %	3 minutes 7 seconds	11
93	u	73 %	3 minutes 7 seconds	11
94	Ishu	73 %	3 minutes 10 seconds	11
95	Shree	73 %	3 minutes 13 seconds	11
96	fire	73 %	3 minutes 17 seconds	11
97	Harsha	73 %	3 minutes 22 seconds	11
98	Vir	73 %	3 minutes 41 seconds	11
99	Dhhritii	73 %	3 minutes 53 seconds	11
100	Akhil yadav	73 %	4 minutes 5 seconds	11
101	Vivek Kumar	73 %	4 minutes 10 seconds	11
102	Vivaan	73 %	4 minutes 32 seconds	11
103	Kj	73 %	4 minutes 43 seconds	11
104	Ravi	73 %	5 minutes 3 seconds	11
105	Priyanshi Yadav	73 %	5 minutes 20 seconds	11
106	Rahi	73 %	5 minutes 20 seconds	11
107	Vaibhav Goel	73 %	5 minutes 34 seconds	11
108	Trinay	73 %	5 minutes 38 seconds	11
109	Shree	73 %	5 minutes 39 seconds	11
110	goluswamy	73 %	5 minutes 45 seconds	11
111	Sahasra Pagidimarri	73 %	5 minutes 45 seconds	11
112	Ghdx	73 %	5 minutes 50 seconds	11
113	jeyvanth	73 %	5 minutes 55 seconds	11
114	Harsha	73 %	5 minutes 58 seconds	11
115	Diksha	73 %	6 minutes	11
116	Ari	73 %	6 minutes 2 seconds	11
117	Aakriti	73 %	6 minutes 4 seconds	11
118	Deepika	73 %	6 minutes 35 seconds	11
119	I	73 %	6 minutes 39 seconds	11
120	GURNOOR	73 %	6 minutes 39 seconds	11
121	golu chaudhry	73 %	6 minutes 51 seconds	11
122	Gaurav Dubey	73 %	7 minutes 34 seconds	11
123	DIYA DIJESH	73 %	7 minutes 49 seconds	11
124	Himanshu	73 %	8 minutes 11 seconds	11
125	F	73 %	8 minutes 13 seconds	11
126	akash	73 %	8 minutes 16 seconds	11
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130	jai	73 %	9 minutes 5 seconds	11
131	Pritha	73 %	9 minutes 42 seconds	11
132	Vighneshwari	67 %	1 minutes 50 seconds	10
133	yo	67 %	1 minutes 59 seconds	10
134	Sahil	67 %	2 minutes 41 seconds	10
135	Shreyansh Singh	67 %	3 minutes 5 seconds	10
136	Nikhil	67 %	3 minutes 6 seconds	10
137	M,ydhz	67 %	3 minutes 32 seconds	10
138	Oufwqeufb	67 %	3 minutes 37 seconds	10
139	Arushi	67 %	3 minutes 42 seconds	10
140	Rukhsar	67 %	4 minutes 9 seconds	10
141	Vivek Kumar	67 %	4 minutes 15 seconds	10
142	Dilasa	67 %	4 minutes 25 seconds	10
143	Kritika	67 %	5 minutes 5 seconds	10
144	Nirun	67 %	5 minutes 19 seconds	10
145	Amal Roshna	67 %	5 minutes 20 seconds	10
146	Shabby	67 %	5 minutes 33 seconds	10
147	Sahil	67 %	5 minutes 33 seconds	10
148	M.Mary Senofiah	67 %	5 minutes 40 seconds	10
149	Mahi sharma	67 %	5 minutes 41 seconds	10
150	Maya	67 %	6 minutes 12 seconds	10
151	kk	67 %	6 minutes 18 seconds	10
152	A	67 %	6 minutes 39 seconds	10
153	Mamta	67 %	6 minutes 48 seconds	10
154	garima	67 %	6 minutes 57 seconds	10
155	Manvith	67 %	6 minutes 57 seconds	10
156	Anupriya patel	67 %	7 minutes 5 seconds	10
157	Shravya	67 %	7 minutes 29 seconds	10
158	g	67 %	7 minutes 42 seconds	10
159	Adarsh	67 %	8 minutes 20 seconds	10
160	Pritam Ghosh	67 %	9 minutes 32 seconds	10
161	mmm	67 %	13 minutes 16 seconds	10
162	Sneha	67 %	33 minutes 15 seconds	10
163	Samarth	60 %	1 minutes 58 seconds	9
164	Manisha	60 %	2 minutes	9
165	Kashish	60 %	2 minutes 7 seconds	9
166	Aditya dubey	60 %	3 minutes 9 seconds	9
167	Rock it 🤛🏻	60 %	3 minutes 26 seconds	9
168	Saanvi	60 %	3 minutes 29 seconds	9
169	Sahaf ahmad	60 %	3 minutes 33 seconds	9
170	Anne	60 %	3 minutes 34 seconds	9
171	..	60 %	3 minutes 46 seconds	9
172	R	60 %	3 minutes 47 seconds	9
173	Pravin	60 %	4 minutes	9
174	Umar	60 %	4 minutes 4 seconds	9
175	yo	60 %	4 minutes 7 seconds	9
176	Prachi	60 %	4 minutes 12 seconds	9
177	Hsvf	60 %	4 minutes 27 seconds	9
178	YUVRAJ JOGSAN	60 %	4 minutes 27 seconds	9
179	Yashika	60 %	4 minutes 40 seconds	9
180	Komal	60 %	4 minutes 56 seconds	9
181	Sri	60 %	5 minutes 7 seconds	9
182	Shatakshi	60 %	5 minutes 19 seconds	9
183	Avantika	60 %	5 minutes 45 seconds	9
184	Nikhil	60 %	5 minutes 51 seconds	9
185	Gf	60 %	5 minutes 58 seconds	9
186	Aditya yadav	60 %	6 minutes 33 seconds	9
187	Anurag soni	60 %	7 minutes 3 seconds	9
188	Bably kimari	60 %	7 minutes 23 seconds	9
189	Bhoomika	60 %	7 minutes 55 seconds	9
190	Kamini	60 %	7 minutes 58 seconds	9
191	Vaibhav Goel	60 %	8 minutes 6 seconds	9
192	Abhishek	60 %	8 minutes 14 seconds	9
193	Deepesh	60 %	8 minutes 58 seconds	9
194	Prachi verma	60 %	9 minutes 57 seconds	9
195	Shivendra Singh Sengar	60 %	10 minutes 4 seconds	9
196	Anushka	60 %	11 minutes 41 seconds	9
197	Priyanshu	60 %	11 minutes 53 seconds	9
198	Beauty Singh	60 %	14 minutes 45 seconds	9
199	Khushi	60 %	23 minutes 55 seconds	9
200	A	60 %	1 hours 7 minutes 7 seconds	9

Key Topics Covered in the Quiz

✔ Ecosystem and Its Components
✔ Food Chain & Food Web
✔ Trophic Levels and Energy Flow
✔ Biodegradable & Non-Biodegradable Substances
✔ Ozone Layer & Its Depletion
✔ Waste Management & Sustainable Development

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Also See: Footprints Without Feet Class 10 MCQ Quiz – Test Your Knowledge

About the Quiz

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Key Topics Covered in the Quiz

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