Home » Our Environment Class 10 Science MCQ With Solutions

Our Environment Class 10 Science MCQ With Solutions

Update on: 02 Feb 2024, 11:57 AM

The Our Environment Class 10 Science MCQ with Answers is designed according to the latest Class 10 Science syllabus. and examination pattern recommended by CBSE for Standard 10. Students can also refer to more Chapter-wise MCQs for NCERT Class 10 Science. This resource will be particularly beneficial for students aiming to achieve high marks in their academic studies, as it allows them to practice multiple-choice questions on specific subjects.

Latest – Magnetic Effects of Electric Current Class 10 Science MCQ With Solutions

CBSE Class 10 Chapter 13 Our Environment MCQs

Check below the MCQ Questions for class 10 Science with answers and Clear your idea of chapter 13 Our Environment.

Q.1. The process of entry of pollutants into a food chain is known as

(a) biomass (b) biomagnification
(c) bioaccumulation (d) biosphere

Answer

(c): Bioaccumulation is the accumulation of substances such as pesticides or other chemicals in an organism. It occurs when an organism absorbs a substance at a rate faster than that at which the substance is lost by catabolism and excretion.

Practice More – CBSE Practice Papers Class 10 (2024) – Free PDF Download

Q.2. In the food chain given below, if the amount of energy available at fourth trophic level is 3 kJ, what was the energy available at the herbivore level?
Grass → Grasshopper → Frog → Snake → Hawk

(a) 3000 kJ (b) 300 kJ
(c) 30 kJ (d) 3 kJ

Answer

Q.3. Acid rain is caused by

(a) sulphur oxides only
(b) nitrogen oxides only
(c) both nitrogen and sulphur oxides
(d) none of these

Answer

(c): Acid rain is caused by oxides of nitrogen (e.g., NO₂ and NO₃ ) and oxides of sulphur (e.g., SO₂ and SO₃ ).

Also Check – CBSE Sample Papers Class 10 for 2024 Board Exams

Q.4. In the given figure, various trophic levels are shown in a pyramid. At which trophic level minimum energy is available?

question 4

(a) T₄ (b) T₂
(c) T₁ (d) T₃

Answer

(a): T1 has maximum energy and it keeps on reducing as we proceed to the next higher trophic levels. Hence, T4 will have the minimum energy.

Q.5. The right path of energy flow in an ecosystem is

(a) Producer → Herbivore → Carnivore
(b) Producer → Carnivore → Herbivore
(c) Herbivore → Carnivore → Producer
(d) Herbivore → Producer → Carnivore.

Answer

(a): Energy flows in an ecosystem in the following direction:
Producer → Herbivore → Carnivore

Q.6. Minamata disease is due to

(a) MIC gas (b) methyl mercury
(c) lead nitrate (d) cobalt chloride.

Answer

(b): Minamata disease is a neurological disorder caused by methyl mercury poisoning. It was first reported near Minamata Bay in Japan in 1956. The symptoms include ataxia, numbness in hands and feet, muscle weakness, damage to hearing and speech.

Q.7. According to Charles Elton, which is not correct?

(a) Carnivores at the top of the pyramid.
(b) Producers at the top of the pyramid.
(c) Energy trapping is high at the top of the pyramid.
(d) Both (b) and (c)

Answer

(d): Charles Elton developed the concept of ecological pyramid. After his name, these pyramids are called as Eltonian pyramids. According to Charles Elton, producers are present at the base of the pyramid and carnivores at the top. According to 10% law of energy transfer, energy goes on decreasing with increase in trophic levels. Thus, energy trapping is high at the base of the pyramid and lowest at top of the pyramid.

Q.8. Which of the followings is abiotic component of an ecosystem?

(a) Producer (b) Consumer
(c) Soil and minerals (d) All of these

Answer

(c): All the interacting organisms in an area together with the non-living constituents of the environment form an ecosystem. Thus, an ecosystem consists of biotic components comprising living organisms and abiotic factors like temperature, rainfall, wind, soil and minerals

CBSE Class 10 Resources – Important Formula Book For 10th Science

Q.9. In a food chain usually the following are found at the third trophic level

(a) producers (b) primary consumer
(c) decomposer
(d) secondary consumer.

Answer

(d): The transfer of food or energy takes place in the various steps or levels in the food chain which are known as trophic levels. Producers or autotrophs are the first trophic level because they fix up the solar energy and make it available for the heterotrophs or the consumers to the next trophic level. Herbivores (primary consumers) are in second trophic level, secondary consumers (carnivores) are in third trophic level and so on.

Q.10. In a given food chain if frog has 100 J of energy then the energy available with plants and snake respectively will be
Plants → Insect → Frog → Snake

(a) 1000 J and 10 J (b) 10000 J and 10 J
(c) 10 J and 1000 J (d) 1000 J and 100 J.

Answer

(b): According to 10% law of energy transfer in a food chain, if a frog has 100 J of energy then the energy in plants will be 10,000 J, 1,000 J in insect and it will be 10 J in snake

CBSE Class 10 Science Our Environment MCQs – PDF Download

Answers-

Summary for NCERT class 10 science chapter 13 – “Our Environment”

The various components of an ecosystem are interdependent.
The producers make the energy from sunlight available to the rest of the ecosystem.
There is a loss of energy as we go from one trophic level to the next, this limits the number of trophic levels in a food-chain.
Human activities have an impact on the environment.
The use of chemicals like CFCs has endangered the ozone layer. Since the ozone layer protects against the ultraviolet radiation from the Sun, this could damage the environment.
The waste we generate may be biodegradable or non-biodegradable.
The disposal of the waste we generate is causing serious environmental problems.

Best Reference Books for Class 10 Science

We hope the MCQs for the CBSE Class 10 Science Chapter 13 on Our Environment are helpful for your board exam preparation.

Keep learning and stay updated with us for more CBSE exam updates.

Leave a Reply Cancel reply

CBSE

CBSE Class 10 and Class 12 Date Sheet Released

Update on: 21 Nov 2024, 10:38 AM

Finally, the Central Board of Secondary Education (CBSE) released the Class 10 and Class 12 date sheets for board examinations 2024 on 20 November 2024. According to the schedule released by the CBSE board, the Class 12 board examination will begin on February 15 and…...

CBSE

CBSE Class 10 English Sample Paper 2024-25 | Free PDF for 2025 Board Exams

Update on: 14 Nov 2024, 10:00 AM

English is one of the important subjects in CBSE Class 10 Board exams. Irrespective of whether you choose Science, Commerce, or Humanities stream after matriculation, English will be a part of all the streams unless you take any other language in intermediate. So, students should…...

CBSE

4 Steps on How to Improve Your Time Management Skills for CBSE Board

Update on: 30 Oct 2024, 02:43 PM

Imagine you are in an exam center and the last five minutes remain of the paper and you still have 5-7 questions to solve. You know the answers to all the questions but are not able to decide which one to prioritize due to the…...

CBSE

How to Write Analytical Paragraph Class 10

Update on: 30 Oct 2024, 02:40 PM

In recent years, the analytical paragraphs have become quite significant in Class 10 board exams. As they hold good weightage in board exams, students must learn to ace analytical paragraphs. Writing an analytical paragraph is a crucial skill that requires certain sets of skills and…...

CBSE

How to Study Biology Class 10: A Comprehensive Guide

Update on: 28 Oct 2024, 03:45 PM

Biology is a crucial subject in Class 10, forming the foundation for future scientific learning. With the right approach, it is not only possible to excel in it but also develop a genuine interest in the subject. A strategic approach can improve understanding and retention.…...

CBSE

6 Mistakes Students need to Avoid 3 Months Before CBSE Board Exams

Update on: 28 Oct 2024, 12:33 PM

Every year, CBSE board exams take place in February and March. That means board students have barely 3 months left to prepare for the upcoming CBSE board exams 2024-25. The urgency and the need to finish the syllabus are also top priorities among board students.…...

CBSE

How to Study For Social Studies (SST) Class 10: A Comprehensive Guide

Update on: 26 Oct 2024, 03:10 PM

Social Science is a crucial subject in Class 10, forming the foundation for future learning. With the right approach, it is not only possible to excel in it but also develop a genuine interest in the subject. This blog will suggest the best strategies to…...

CBSE

4 Tricks to Finish the Board Exam Before 3 Hours

Update on: 25 Oct 2024, 10:02 AM

Every student dream of not just completing their exam within the time limit, but also having extra time to spare for revision. As a CBSE student, the pressures and challenges you face during board exams are all too familiar. The ticking clock can become a…...

CBSE

How to Study Chemistry Class 10: A Comprehensive Guide

Update on: 24 Oct 2024, 02:46 PM

Chemistry is a crucial subject in Class 10, forming the foundation for future scientific learning. With the right approach, it is not only possible to excel in it but also develop a genuine interest in the subject. This blog will suggest the best strategies to…...

CBSE

How to Fill OMR Sheet in Board Exam Class 10

Update on: 24 Oct 2024, 10:48 AM

One of the most important aspects to keep in mind while filling your OMR sheet is accuracy. To achieve accuracy, you need a significant amount of concentration and focus throughout your examination. In this blog, we'll explore some important guidelines and strategies to ensure that…...