NCERT Solutions for Class 10 Science Chapter 15 – Our Environment – CBSE Term II Free PDF Download Students gain from our environment in terms of fully comprehending concepts. All NCERT Solutions are written by subject specialists and are based on the most recent CBSE syllabus.
The questions and detailed answers will assist you in comprehending the concepts and ideas presented in the CBSE Class 10 Science Term II test. Students are recommended to study from NCERT Solution for Class 10 in order to do well in the Term II exams.
This chapter covers topics such as air, air ingredients, wind, the air in the soil and its importance, oxygen and its importance for living beings, the atmosphere, and the importance of plants for our survival.
NCERT answer key for 10th class Science Chapter 15 covers important subjects. Our Environment
- Is air present in all of our surroundings?
- What is the composition of air?
- How does oxygen get to the animals and plants that live in the water and soil?
- What happens when the oxygen in the atmosphere is depleted?
CHAPTER 15_OUR ENVIRONMENT NCERT SOLUTIONS
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
A. a) Grass, flowers and leather c) Fruit-peels, cake and lime-juice
d) Cake, wood and grass
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
A. b) Grass, goat and human.
3. Which of the following are environment-friendly practices ?
a) Carrying cloth-bags to put purchases while shopping.
b) Switching off unnecessary lights and fans.
c) Walking to school instead of getting your mother to drop you on her
d) All of the above
A. d) All of the above
4. What will happen if we kill all the organisms in one trophic level ?
A. i) Each step or level of the food chain forms a trophic level.
ii) Various trophic levels are connected through food chains.
iii) Hence, killing of all the organisms in one trophic level leads to destruction of organisms of another trophic level.
iv) This will disturb the entire ecosystem.
5. Will the impact of removing all the organisms in a trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?
A. i) Yes, the impact of removing all the organisms is different for different trophic levels because all the organisms in an ecosystem are interdependent.
ii) No, the organisms of any trophic level can not be removed without causing damage to the ecosystem.
6. What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem?
A. i) The phenomenon of accumulation of toxic substances in each trophic level is called Biological magnification or Biomagnification.
ii) Yes, the levels of Biomagnification is different at different levels of ecosystem. It will be highest in the last trophic level.
7. What are the problems caused by the non-biodegradable wastes that we generate?
A. Non biodegradable wastes cause –
i) soil, water and air pollution.
8. If all the waste we generate is biodegradable, will this have no impact on the environment?
A. If all the waste we generate is biodegradable, it will have very little impact on the environment because biodegradable wastes will be broken down by the decomposers.
9. Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage?
A. i) Damage to the ozone layer is a cause for concern because it absorbs ultraviolet radiation and saves us from it.
ii) Ultraviolet radiation causes harmful effects on organisms.
iii) It also causes skin cancer, cataract and damage to the immune system in humans.
Steps to be taken to limit the damage to ozone layer :
i) Reduce the use of Chlorofluorocarbons in refrigerators, air conditioners, etc.
ii) Avoid using CFCs in aerosols and sprays.
iii) Use ozone friendly sprays in perfumes, insect – repellants, etc.
10. Why are some substances biodegradable and some non-biodegradable ?
A. i) Substances that are broken down into simple and harmless substances by biological processes are called biodegradable substances.
Eg : Domestic wastes, sewage, cow dung, etc.
ii) Substances that are not broken down into simple and harmless substances by biological processes are called non-biodegradable substances.
Eg : Plastics, polythene bags, insecticides like DDT, etc.
11. Give any two ways in which biodegradable substances would affect the environment.
A. i) Biodegradable substances produce foul smell during decomposition process.
ii) They also release carbon during decomposition and add it to the atmosphere.
iii) Some of the biodegradable substances like plant and animal wastes are converted into humus will enhance the fertility of the soil.
12. Give any two ways in which non-biodegradable substances would affect the environment.
A. i) Non-biodegradable substances cause pollution.
ii) They may get accumulated in the bodies of animals and harm them.
13. What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
A. Each step or level of the food chain forms a trophic level.
Example for food chain-
14. What is the role of decomposers in the ecosystem ?
A. i) Decomposers are the essential components of any ecosystem.
ii) They recycle nutrients in dead organisms and their wastes.
iii) They reduce the pile up of wastes and make nutrients available to the plants to grow.
iv) They help in natural replenishment of the soil.
15. What is ozone and how does it affect any ecosystem ?
A. i) Ozone (O3) molecule is formed by three atoms of oxygen.
ii) Ozone is a deadly poison.
iii) However, at the higher levels of the atmosphere, ozone performs essential functions.
iv) It shields the surface of the earth from ultraviolet (UV) radiation.
16. How can you help in reducing the problem of waste disposal ? Give any two methods.
A. i) Avoid using non-biodegradable materials like polythene and plastic as packaging materials.
ii) Use ecofriendly carry bags.
iii) Dispose the wastes after segregating them as biodegradable and non- biodegradable wastes.
iv) Reuse and recycle non-biodegradable materials like metals and plastics.
v) Convert biodegradable wastes into manure by vermicomposting or by composting, etc.
NCERT Exemplar Solutions for Class 10 Science Chapter 15 are also given.
Class 10 Science Chapter 15 CBSE Notes
Chapter 15 – Our Environment NCERT Answers for Class 10 Science
15th Chapter Our Environment is one of the most essential chapters in Class 10 Science, and it carries a 3-point weighting. Students will learn about the ecosystem and its components, as well as the numerous human activities that affect the environment, in Chapter 15 of NCERT Solutions for Class 10 Science.
This chapter covers the following topics:
Food Chains and Webs in — two questions (2 long)
Three questions about how to manage the rubbish we generate (3 long)
Chapter 15 – Our Environment NCERT Solutions for Class 10 Science
All creatures, including bacteria, plants, animals, and humans, as well as their physical surroundings, interact with one another to keep nature in balance. An ecosystem is made up of all of these interacting organisms as well as non-living environmental elements. NCERT Solutions Class 10 Science Chapter 15 examines how diverse environmental components interact with one another and how humans affect the environment.
Chapter 15 – Our Environment: Key Features of NCERT Solutions for Class 10 Science
- Answers all of the chapter’s questions in detail.
- Genuine and relevant replies are supplied in clear language that may be comprehended by anyone.
- For CBSE exams, Olympiads, and other competitive exams, these solutions can be used.
- Concise responses are offered to assist pupils in better understanding.
NCERT Solutions for Class 10 Science Chapter 15: Frequently Asked Questions
What kinds of questions are asked in Chapter 15 of the NCERT Solutions for Class 10 Science book?
The following are examples of questions from Chapter 15 of NCERT Solutions for Class 10 Science:
- A short response
- A brief response
- a long response
3 MCQs, 1 very short answer, 7 short answers, and 5 long answer questions are included in Chapter 15 of NCERT Solutions for Class 10 Science. Students can respond to questions with really short answers in a single statement.
Is it possible to get a free copy of NCERT Solutions for Class 10 Science Chapter 15 Our Environment in PDF format?
Yes, INFINITY LEARN offers a free PDF download of NCERT Solutions for Class 10 Science Chapter 15 Our Environment. The solutions are based on the most recent CBSE standards and syllabus. Students can use the chapter-by-chapter and exercise-by-exercise PDF links to supplement their CBSE Term II test preparation. All of the answers are based only on the CBSE board’s recommended textbook. Students can use the solutions PDF to strengthen their logical reasoning and analytical thinking skills, which are crucial for passing the exam.
In Chapter 15 of NCERT Solutions for Class 10 Science, what is the notion of biological magnification discussed?
Biological amplification is the accumulation of hazardous chemical substances in the bodies of living creatures at various trophic levels of the food chain. This idea is discussed in many instances in order to provide students with a thorough understanding. The solutions to Chapter 15 are created by INFINITY LEARN faculty with the students’ understanding abilities in mind. Students should download the NCERT Solutions for Class 10 Science Chapter 15 PDF from INFINITY LEARN to acquire a better understanding of the concepts presented in this chapter.