NCERT Solutions Class 10 Science Our Environment – CBSE Free PDF Download
NCERT Solutions for Class 10 Science Chapter 15 Our Environment: Welcome to the comprehensive our environment class 10 ncert solutions. Our environment class 10 questions and answers article serves as a valuable resource for students seeking in-depth class 10th science notes and extra questions for this chapter. With our expertly crafted NCERT solutions, you can not only excel in your board exams but also enhance your preparation for competitive exams like JEE Main, NEET, and JEE Advanced. Designed in line with the latest CBSE exam pattern, our MCQ questions carry significant weightage to boost your scores. By studying from these Class 10 Science chapter 15 question answer, prepared by subject experts, you will gain a thorough understanding of the concepts and ideas presented in the Class 10 Science examination.
NCERT Solutions For Class 10 Science Chapter 15 Our Environment We all know the importance of our Environment but now it is not like it was. In this ch 15 science class 10 of NCERT class 10 science book, we are going to learn about such transformations which have happened in our ecosystem. Solutions of CBSE NCERT Class 10 science chapter 15 Our Environment explains all the questions related to this chapter. Since CBSE class 10 is a board class it is extremely important to understand topics carefully, therefore, Our Environment Class 10 will give solutions to all the topic-related doubts mentioned in NCERT book. Our Environment Class 10 pdf solutions can be used to prepare offline.
NCERT Solutions for Class 10 Science: Important Formulas and Diagrams + eBook link
Class 10th science chapter 15 question answer: Important Formulas and Diagrams + eBook is of utmost importance for students as it offers a concise and organized collection of key formulas and diagrams that are essential for understanding various scientific concepts. By having quick access to these fundamental elements, students can efficiently revise and apply them during homework, exam preparation, and class discussions. The eBook provides a comprehensive resource that aids in building a strong foundation, boosting problem-solving skills, and ultimately achieving academic excellence in Class 10 Science.
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Download Ebook - NCERT Class 10 Science: Chapterwise Important Formulas, Diagrams, And Points
NCERT Solutions for Class 10 Science Chapter 12 Electricity - Important Topics
ch 15 Science class 10 covers the following important topics:
The presence of air in the surrounding environment.
The composition of air.
Availability of oxygen to aquatic and soil-dwelling organisms.
The process of replenishing the oxygen in the atmosphere.
Also Read :
Download NCERT Our environment class 10 solution for free.
This chapter has been renumbered as Chapter 13 in accordance with the CBSE Syllabus 2023–24.
NCERT Solutions for Class 10 Science Chapter 15 Our Environment
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Topic 15.1: Ecosystem and What are its components:
Q. 1. What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
Answer:
Each step or level of the food chain is known as a trophic level. Transfer of energy in the form of food takes place from one trophic level to the next. Trophic levels can be broadly classified as Producers; Primary, Secondary and Tertiary Consumers.
An example of a food chain:
Grass 
Grasshopper Frog Snake Eagle
Here, Grass is a producer, Grasshopper is herbivore, Frog is first carnivore, Snake is second carnivore and Eagle at the top is third carnivore.
Q. 2. What is the role of decomposers in the ecosystem?
Answer:
Decomposers break down the organic components of dead and decaying matter into simple inorganic substances. The organic matter like dead animal bodies are recycled in the ecosystem thereby cleaning the environment. And, the inorganic elements return back the minerals into the soil making the soil fertile. Thus, decomposers play a vital role in the ecosystem.
Our Environment Class 10 topic 15.2 How do Our Activities Affect the Environment?
Q. 1. Why are some substances biodegradable and some non-biodegradable?
Answer:
Substances that can be broken down by biological processes are said to be biodegradable. In our environment, many of the substances are broken easily by decomposers. Examples: Paper, vegetable peels etc.
However, substances which cannot be broken down biologically but by physical means are known as non-biodegradable substances. Example: Plastic.
Q. 2. Give any two ways in which biodegradable substances would affect the environment.
Answer:
Two ways in which biodegradable substances would affect the environment are:
1. These substances on degradation can produce foul smell which affects the population living nearby. They may also become a breeding place for insects.
2. Many harmful greenhouse gases may evolve during degradation leading to global warming.
Q. 1. What is ozone and how does it affect any ecosystem?
Answer:
Ozone ( 
) is a molecule formed by 3 oxygen atoms. Ozone is present in the stratosphere shielding the earth's surface from the harmful UV rays by absorbing it.
Ozone may affect the ecosystem in the following ways:
1. If this layer gets depleted, the UV rays can cause cancer in human beings and also some plants and animals.
2. The UV rays may effect the plants and destroy the vegetations.
Q. 2. How can you help in reducing the problem of waste disposal? Give any two methods.
Answer:
Two methods used to reduce the problems of waste disposal are:
- Throwing biodegradable and non-biodegradable waste into separate dustbins so that recycling can be done easily.
- By putting the organic waste into compost pits dug in the ground and preparing compost. This compost helps in increasing the fertility of soil.
- Practicing the 3 R's: Reduce, Reuse and Recycle.
NCERT Solutions Class 10 Science Chapter 15 Our Environment Exercise
Q. 1. Which of the following groups contain only biodegradable items?
(a) Grass, flowers and leather
(b) Grass, wood and plastic
(c) Fruit-peels, cake and lime-juice
(d) Cake, wood and grass
Answer:
Plastic is a non-biodegradable substance.
Hence, (a), (c) and (d) groups contain only biodegradable items.
Q. 2. Which of the following constitute a food-chain?
(a) Grass, wheat and mango
(b) Grass, goat and human
(c) Goat, cow and elephant
(d) Grass, fish and goat
Answer:
A food chain constitute of different trophic levels.
(b) Grass Goat Human; constitute a food chain.
Here, grass is a producer, goat is primary consumer and human is secondary consumer.
Q. 3. Which of the following are environment-friendly practices?
(a) Carrying cloth-bags to put purchases in while shopping
(b) Switching off unnecessary lights and fans
(c) Walking to school instead of getting your mother to drop you on her scooter
(d) All of the above
Answer:
All of the above metioned practices are environment friendly. Hence (d) All of the above is the correct answer.
Q. 4. What will happen if we kill all the organisms in one trophic level?
Answer:
If all the organisms of one trophic level are killed, the food chain will become competely imbalanced. The organisms in the immediate higher trophic level will die out due to unavailability of food and the consequences will follow. Also, population of the organisms in the immediate lower trophic level will keep on increasing and this in turn will wipe out its immediate lower level due to higher demand but lower supply. Thus the whole food chain will collapse.
Q. 6. What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem?
Answer:
Biological Magnification is the increase in concentration of harmful substances in the body of the living organism at each trophic level.
Yes, the levels of this magnification is different at different levels of the ecosystem. It is highest at the topmost level of the food chain.
As the chemicals like pesticides, DDT are non-degradable, these get accumulated progressively at each trophic level. As human beings occupy the top level in any food chain, the maximum concentration of these chemicals get accumulated in their bodies.
Q. 7. What are the problems caused by the non-biodegradable wastes that we generate?
Answer:
The non-biodegradable waste that we generate has the following problems on environment:
1. Non biodegradable wastes like pesticides reduce the fertility of soil as they penetrate into it. The pH level of the soil becomes unsuitable for vegetation.
2. Non biodegradable wastes like pesticides get accumulated progressively at each trophic level and thus harm the organisms.
3. Non-biodegradable materials like plastics on burning releases toxic chemicals into the environment which leads to air pollution.
Q. 8. If all the waste we generate is biodegradable, will this have no impact on the environment?
Answer:
If all the waste we generate is biodegradable, this will also have impact on the environment. These waste when not disposed properly releases foul smell which affects the population living nearby. These waste can also become breeding place for mosquitoes and other insects causing spread of diseases. Therefore, proper dumping ground should be made for these biodegradable waste.
This is the list of the topics which you are going to study in NCERT Class 10 Science chapter 15 Our Environment:
Students can look for the NCERT solutions to check answers of other chapters too. They are advised to go through NCERT solutions for Class 10 to score good marks in Board examination.
NCERT Solutions for Class 10 Science Chapter 15 - Types of Questions Asked
In general, 4 types of questions are asked in CBSE Class 10 Science Board exam
These questions carry marks from one to five, they are vital to study. Class 10 science ch 15 question answer as it is going to help you put these marks in your bucket easily. Students can easily grab full marks from this chapter by solving the questions in the NCERT book. So, to help students with this chapter we have provided solutions of NCERT for Class 10 Science chapter 15 Our Environment.
Also, check - NCERT Solutions for Class 10 Maths
NCERT Class 10 Science Solutions Chapter 15 - Weightage in Board Exams
Class 10 Science chapter 15 question answer holds significant importance as it carries a weightage of 3 marks in the Class 10 Science examination. This chapter provides comprehensive insights into the ecosystem and its components, as well as the crucial role of human activities in impacting the environment. By studying Chapter 15 science class 10 thoroughly, students can gain a deeper understanding of ecological balance and environmental conservation, thus enhancing their knowledge and scoring well in the exams.
How to Access NCERT Solutions for Class 10 Science Chapter 15?
To access solution of ch 15 science class 10 - "Our Environment", follow these steps:
- Scroll down the website's page where you're looking for chapter 15 class 10 science solutions.
- Select the chapter according to your comfort.
- After clicking the provided link you will redirect to the solution page.
- You can download the PDF to access them offline anything without any charge.
- Also, you can access Important formulas, and notes for chapterwise by visiting the solution page.
Our environment class 10 questions and answers pdf provides detailed explanations and answers to both exercise questions and topic-specific queries. By utilizing these solutions, students can gain a comprehensive understanding of the chapter, boost their exam preparation, and approach the CBSE board exam with confidence, aiming for academic success.
How are CBSE Our environment Class 10 NCERT solutions Going to Help You:
Our environment class 10 solutions, will be a big help as it gives detailed answers to the questions given in NCERT book.
It would be better to practice CBSE previous year question papers. This tip will give the clarity of a variety of questions asked in exams.
Students can also take the help of experts in case of any related queries.
Key Features of NCERT Solutions for Class 10 Science Book Chapter 15 – Our Environment
Comprehensive Coverage: The class 10 science chapter 15 exercise solution cover all the topics and concepts in Chapter 15, covering all the important topics related to the environment, ecosystem, and human activities.
Step-by-Step Solutions: The solutions for Chapter 15 science class 10 provide step-by-step explanations for each question, making it easy for students to understand and follow.
Clarity and Accuracy: Our environment class 10 questions and answers are prepared by subject experts, ensuring accuracy and clarity in explanations.
Application-Oriented Approach: class 10 Science ch 15 question answer focus on helping students apply the concepts effectively, preparing them for various types of questions in exams.
Easy Accessibility: The NCERT Solutions are readily available online and offline in the form of PDF, allowing students to access them anytime and anywhere for quick revision and practice.
Boosts Exam Preparation: By using these solutions, students can enhance their exam preparation, build confidence, and perform well in the Class 10 Science exam.
Supplementary Practice: In addition to exercise questions, our environment class 10 ncert solutions also offer topic-specific questions to provide comprehensive practice.
Also Check NCERT Books and NCERT Syllabus here:
Chapter Wise Solutions of NCERT for class 10 Science
NCERT Solutions for Class 10 - Subject Wise
NCERT Science Exemplar Solutions Class 10 - Chapter Wise
