Xam Idea Class 10 Science Chapter 15 Solutions: Our Environment

Xam Idea Class 10 Science Solutions for Chapter 15 – Our Environment will take your understanding of the chapter on the next level. These solutions are created in accordance with the latest CBSE Xam Idea Class 10 Science Solutions exam pattern. Our subject matter experts have answered every question in detail with proper explanations to maximize your learning efforts for board exams. You will be able to learn about the environment, environmental consequences, the different types of animals in our ecosystem, the greenhouse effect and ozone layer depletion.

Xam Idea Class 10 Science Solutions for Chapter 15 – Our Environment include 6 exercise sections. Each section contains different types of questions that can be expected in the CBSE exams. There are some higher-order thinking questions designed especially for competitive exams and olympiads. You will also encounter very short questions, short questions, long questions and value-based questions in the exercises. In these 6 sections, you will find a total of 60 questions that check how clearly you understand the chapter.

Our Xam Idea Class 10 Science Solutions for Chapter 15 – Our Environment will be the best option for you in your board exam time. We have provided all the important solutions for the questions given in Xam Idea Class 10 Science Chapter 15 Our – Environment. All the solutions for Xam Idea Class 10 Science book are designed to make your learning easy. You will be able to cover up your whole syllabus in very less time and would be able to save some time for revision.

Important Topics for Xam Idea Class 10 Science Solutions Chapter 15 – Our Environment


  • Environment means everything which surrounds us. It incorporates living (biotic) and non-living (abiotic) segments. So, it may include all creatures, water & air also.
  • The condition of the environment of the Earth influences the life and advancement of a life form in its normal environment and the other way around.
  • Substances that are decomposed are called biodegradable. Eg. natural squanders while a few substances like plastics, a few synthetic compounds (DDTs and manures) are dormant and can’t be deteriorated, are called Non-biodegradable. 
  • Non-biodegradable persist in the environment for a long time or may harm the various members of the ecosystem.

Ecosystem and Its Components 

All the associating living beings in a region along with non-living segments structure a biological system. So a biological system comprises both biotic (living animals) and abiotic segments like temperature, precipitation, wind, soil, and so forth. All living organisms are classified on the basis of how they survive in the Ecosystem. These groups include:

(I) Producers– All green plants, blue-green can create their food (Sugar and starch) from inorganic substance utilizing light vitality (Photosynthesis).

(II) Consumers– Include living beings that rely upon the makers either legitimately or in a roundabout way for their food.  In other words, consumers consume food produced by producers. Consumers are of four types herbivores (grass eater), Carnivores (Flesh eater), Parasite (Live & feed on the host body) and Omnivores (Feed on both plant and flesh). 

(III) Decomposers– Fungi and Bacterias which separate (disintegrate) the dead plant, creatures complex mixes into the easier one. Thus decomposers help in the replenishment of natural resources.

Biotic Groups of the Environment 

The natural way of life alludes to a course of action of various biotic gatherings in a grouping of vitality move. These biotic groups are producer herbivores, carnivores. 

  • In a food chain, these biotic components where the transfer of energy takes place is called a trophic level.
  •  The green plants capture 1% of the sunlight falling on their leaves.
  •  The progression of vitality is unidirectional in a natural way of life
  •  There is a gradual decrease in the amount of energy transfer from one trophic level to the next trophic level in a food chain only 10% of Energy is transferred to the next trophic level while 90% of energy is used by the present trophic level in its life processes.
  •  While the concentration of unsafe substance increments with each next trophic level in a natural way of life. It is called Bio-magnification.  
  • For example, the maximum concentration of such chemicals accumulated in human bodies.
  • Naturally, the food chains are interconnected with each other forming a web-like pattern, which is known as a food web. 
  • The loss of vitality at each progression (trophic level) is high, so next to no measure of vitality stay after four trophic levels.
  • There is generally a big population at lower trophic levels of an ecosystem. For Eg.  the number of inhabitants in the maker is higher than the shopper flesh-eater (lion) populace.

Environmental Problems

Changes in the earth influence us and our exercises change nature around us. This led to the slow degradation of the environment that arose many environmental problems. For example, depletion of the Ozone layer and waste disposal.

(I) Depletion of Ozone Layer

  •  The Ozone layer is largely found in the stratosphere which is a part of our 3 atmospheres from 12 km – 50km above sea level.
  •  Ozone is a dangerous toxic substance at the ground level.
  • Ozone is shaped because of the accompanying photochemical response. 
  • The ozone layer is a protective blanket around the earth which absorbs most of the harmful U.V. (Ultraviolet) radiation of the Sun, thus protecting the living beings of the earth from health hazards like skin cancer, cataract in eyes, weakened immune system, destruction of plants, etc.
  • The decline of Ozone layer thickness is Antarctica was first discovered in 1985 and was termed as Ozone Hole. 

Reason of Ozone Depletion:

Over the top utilization of CFCs (Chloro Fluoro Carbon) a manufactured, idle synthetic Eg. Freon which is utilized as refrigerants and in fire quenchers caused Ozone exhaustion in the upper environment. A solitary chlorine particle can devastate 1,00,000 Ozone atoms. U.N.E.P  (United Nations Environment Programme) did an excellent job in forging an agreement to freeze CFC production at 1986 levels (KYOTO Protocol) by all countries.

you will study this topic in more detail in the chapter.

(II)Garbage Disposal

Industrialization and the rise in demand for consumer goods have created a major problem in the form of wastes/garbage accumulation and disposal, especially in urban areas. The various strategies for strong squanders removal normally utilized far and wide are:

  1. Open dumping: A regular strategy where strong squanders dumped in chosen zones of a town. It causes pollution
  2. Land fillings: Wastes are dumped in the low living area and are compacted by rolling with bulldozers
  3. Treating the soil: Organic squanders are filled into a manure pit (2m x 1m x 1m). It is then secured with a slight layer of soil. After around a quarter of a year, a similar trash-filled inside the pit changes into natural excrement.
  4. Recycling: The solid wastes are broken down into its constituent simpler materials. These materials are then used to make new things. Indeed, even non-bio degradable strong squander like plastic, metal can be reused.
  5. Reuse: An exceptionally basic ordinary procedure of utilizing a thing again and once more.  For Eg. paper can be reused for making envelopes etc.

Exercise Discussion for Xam Idea Class 10 Science Solutions Chapter 15 – Our Environment

Very Short Answer Type Questions 

This section will provide you with 26 questions and each question is of 1 mark. In this section, you mainly found the questions that help you to cover up your definitions and other small portions. List two examples of natural ecosystems, why are green plants called producers, What is incineration, etc are some examples of the questions that you will find in this section.

Short Answer Type Question- I

In this section, you will be given 13 questions each of 2 marks. Reasons why does a food chain consist of only three to four steps, state two practices which can help in the protection of our environment, the reason why crop fields are known as artificial ecosystems are some examples of the questions that are provided in this section.

Short Answer Type Question- II

In this section, you have to go through with 12 questions and each question is of 3 marks. This section helps you to cover up your most important portion of the chapter. What is biodiversity, what will happen if the biography of an area is not preserved, describe any four modes of disposal of waste, provide three characteristics of the food chain, etc are some of the questions that you will find in this short answer type questions section.

Long Answer Type Question

In this section, you will find 3 questions and each of them contains 5 marks. Suggest any five activities in daily life which are eco-friendly, explain some harmful effects of agricultural practices on the environment are some examples of the question that are there in this long answer type questions section.

HOTS (Higher-Order Thinking Skills)

In this section, you will get 3 questions that are given to check your higher-order thinking skills. Each question checks your extra knowledge about the chapter.

Value-Based Questions

In this section, you will find 3 questions that are mainly created to check what values you learn from the chapter and how gonna use them in your life.

Why Use Xam Idea Class 10 Science Solutions for Chapter 15 – Our Environment

  • Xam Idea Solutions for Chapter 15 – Our Environment is designed to help you learn and prepare for CBSE Class 10 examination. 
  • Our Xam Idea Class 10 Science solutions are specially created by subject experts. These experts use different types of techniques to make all the solutions easy to learn. 
  • Through our Xam Idea Class 10 Science Solutions for Chapter 15 – Our Environment, you can cover up your whole syllabus in very less time and can save some of your time for revision.
  • All the solutions are in adherence to the latest CBSE Class 10 Science syllabus and NCERT textbooks.