Students may better prepare for the Class 10 board exams by using the material provided in the NCERT Solutions Science. This knowledge is extremely crucial as it assists students in better comprehending difficult subject matter. Checking how well you understand a certain subject by reading the solutions to the questions asked in the textbook is a great way to figure out where your knowledge is strongest and where it needs improvement. Our subject matter specialists have designed these NCERT Solutions for Class 10 Science in such a manner that the students will have a much better understanding of all of the subjects that are included in the curriculum for CBSE Class 10 Science.

Students are able to create a strong conceptual basis with the help of the NCERT Solutions PDFs available at SWC. This base plays a key part in the students’ preparation for the latter phases of the competitive examinations. We give comprehensive answers to challenges posed by NCERT in accordance with the methodology provided by CBSE. The students are able to effortlessly prepare all of the ideas that are presented in their respective courses better and more successfully, and they are even able to succeed in passing the most difficult competitive examinations, such as JEE Main, JEE Advanced, NEET, AIMS, and so on.

Your academic journey begins a new stage as you reach the eighth grade, and a new facet of learning awaits you. This is the year where pupils begin to acquire an interest in the topic at hand, and it is also the year in which you choose whether you will study business, humanity, or science in the following year (class 12). As a consequence of this, having a solid foundation of knowledge in fields such as mathematics and physics comes highly recommended. The NCERT textbook for class 8 is the greatest book now available on the market for enhancing one’s education in the areas of mathematics and science. Read up on the theory that is presented in the book for grade 8 and answer all of the questions that are posed in the practice section of the NCERT textbook.

When working through the exercises in the NCERT textbook, if you run into any type of difficulty or uncertainty, you may use the swc NCERT Solutions for class 8 as a point of reference. While you are reading the theory form textbook, it is imperative that you always have notes prepared. You should make an effort to understand things from the very beginning so that you may create a solid foundation in the topic. Use the NCERT as your parent book to ensure that you have a strong foundation. After you have finished reading the theoretical section of the textbook, you should go to additional reference books.


Question 1. Fill in the blanks.

(a) A place where animals are protected in their natural habitats is called_____________.

(b) Species found only in a particular area is known as ____________.

(c) Migratory birds fly to faraway places because of ____________ changes.

Solution :

(a) A place where animals are protected in their natural habitats is called wildlife sanctuary.

(b) Species found only in a particular area is known as biodiversity.

(c) Migratory birds fly to faraway places because of climate changes.

Question 2. Differentiate between the following.

(a) Wildlife sanctuary and biosphere reserve

(b) Zoo and wildlife sanctuary

(c) Endangered and extinct species

(d) Flora and fauna

Solution :


Wildlife sanctuaryBiosphere Reserve
An area within which wild animals are protected from external dangers like hunting.An area constructed for the conservation of biodiversity.
Adequate habitat and protection are provided for the wild animals living in a sanctuary.Several life forms like plants, animals, and micro-organisms conservation are possible in a reserve.
Eg: Corbett national parkEg: Nilgiri Biosphere reserve


ZooWildlife Sanctuary
Animals are kept in artificially constructed facilities for public exhibition.An area within which wild animals are protected from external dangers like hunting.
It is an artificial habitat and the animals may or may not adapt to the new conditions.The animals are conserved within their natural habitat itself. So, they won’t have a problem with their surroundings.


Endangered SpeciesExtinct Species
The species which are on the verge of extinction are called as Endangered species.The species of animals or plants that no longer exists are called Extinct species.
Eg: Bengal Tiger, Blue Whale, etc.Eg: Caribbean monk seal, Great Auk, Passenger pigeon.


It is the collective name for the plant life from a particular area.It is the collective name for the animal life from a particular area
Eg: Spurge and Hogweed from the Nilgiris regionEg: Langur, Tiger, Tahr from the Nilgiris region.

Question 3. Discuss the effects of deforestation on the following.

(a)Wild Animals


(c)Rural areas / Villages

(d)Urban areas / Cities


(f)The next generation

Solution :

(a) Effects of deforestation on wild animals: Removal of trees and plant life from a particular area for the construction of industries, reclamation for agriculture or for other such purposes is termed as Deforestation. Plant life forms an integral part of any ecosystem and these plants form the natural habitat of various animals of that ecosystem. Destroying the plant life will ultimately threaten the existence of animals in that particular ecosystem and may lead to their extinction.

(b) Effects of deforestation on the environment: In plants, Photosynthesis takes place by the absorption of CO2 from the earth’s atmosphere. The percentage of CO2 in the atmosphere increases rapidly if the plant life of an area is destroyed. Increased concentrations of CO2 result in the trapping of excessive heat radiations within the Earth’s atmosphere contributing to global warming. This results in the rise of the temperature of the Earth and disturbs the water cycle which occurs in nature. Hence, rainfall pattern changes leading to droughts and floods.

(c) Effects of deforestation on villages: The soil particles are held together in place by the roots of the plants, trees and other vegetation. In the event of water flow or a high speed wind over the top layer of the soil, the soil particles get removed easily as there are no plants to hold it in place. Thus, Soil erosion is increased by deforestation activities. Soil loses fertility and loses humus. Hence, a fertile land, fit for agriculture and a source of living for farmers turns into a desert.

(d) Effects of deforestation on cities: The risk of natural calamities like floods and drought in urban areas is increased by deforestation. It will also lead to global warming because of increased CO2 levels in the atmosphere. This is a result of continuous pollution from automobiles and industries. The water cycle in the vicinity is also affected.

(e) Effects of deforestation on Earth: Deforestation leads to increased chances and occurrences of desertification, droughts and floods. Carbon Dioxide level in the earth’s atmosphere also increases which leads to global warming. Water cycle is disrupted and also there is an increased risk of natural calamities.

(f) Effects of deforestation on next generation: Our Environment is slowly changed by the activities of deforestation, both directly and indirectly. Soil erosion, global warming, desertification, drought, greenhouse effect, floods and many other problems are caused only because of deforestation. Ultimately, the next generation will be facing the consequences of deforestation.

Question 4. What will happen if:

(a)We go on cutting trees.

(b)The habitat of an animal is disturbed.

(c)The top layer of soil is exposed.

Solution :

(a) If we go on cutting trees, the natural habitat of many animals will get completely destroyed. it will have the following consequences.

 i.Ecological balance will be disturbed.

 ii.As a result, the biodiversity of many areas will be severely affected.

 iii.Also, there will be an increase in the temperature of the Earth as a result of global warming, which can disturb the natural water cycle. As a result, there will be a change in the rainfall pattern. This could lead to floods or droughts. This will also increase the risk of soil erosion, desertification, and natural calamities.

(b)The habitat of an animal provides it with necessities such as shelter, food, and protection. If the habitat of an animal is disturbed, then it will be forced to go to other places in search of food and shelter. The animal could get killed by other animals in this process. This will ultimately become a major threat to the biodiversity of earth.

(c)If the top layer of soil is exposed, then it will gradually expose the lower layer of soil, which is hard and rocky in nature. This type of soil is less fertile as it contains less humus. Continued soil erosion will make the land barren or infertile.

Question 5. Answer in brief.

(a) Why should we conserve biodiversity?

(b) Protected forests are also not completely safe for wild animals. Why?

(c) Some tribal depends on jungle. How?

(d) What are the causes and consequences of deforestation?

(e) What is Red Data Book?

(f) What do you understand by the term migration?

Solution :

(a) If the biodiversity is not conserved, the life existing on earth, their interrelationships and their relationship with environment will be disturbed.

(b) It is because despite all these the poachers keep killing or capturing the animals in these forests. That is why protected forests are also not completely safe for animals.

(c) Some tribal live in the jungle. Jungle provides them food and protection. That is why; they are fully dependent upon the forests.

(d) Causes of deforestation-

(i) Procuring land for cultivation.

(ii) Building houses and factories.

(iii) Natural Calamities like flood, drought and forest fire.

Consequence of deforestation-

(i) Global warming.

(ii) Soil erosion

(iii) Melting of ice on poles.

(e) Red Data Book a book which keeps record of all endangered animals and plants.

(f) Migration is the phenomenon of movements of species from its own habitat to some other habitat for particular time period every year for change of climate and for the purpose of breeding.

Question 6. In order to meet the ever-increasing demand in factories and for shelter, trees are being continually cut. Is it justified to cut trees for such projects?

Solution : No. It is not at all justified to cut trees to meet the ever increasing demands of human population. Forests are the habitat of several organisms including wild animals. They provide us with good quality air as they give out O2 and absorb the harmful CO2 gas from the atmosphere. In this process, they prevent the excessive heating of the atmosphere. They prevent soil erosion and natural calamities such as floods and droughts. They increase the fertility of the soil and help to conserve biodiversity. The cutting of forests to meet the demands of growing human population will lead to global warming, soil erosion, greenhouse effect, droughts, floods, and many more problems. The destruction of forests will disturb the balance of nature. Hence, forests must be conserved.

Question 7. How can you contribute to the maintenance of green wealth of your locality? Make a List of actions to be taken by you.

Solution : I can take care of the green cover of my locality by looking after the trees and plants growing in my locality. I shall motivate the people of my neighborhood to plant more trees and take care of the existing trees by creating an awareness about the importance of the plant life in an ecosystem. In order to make this possible, I would initiate the proceedings and organize weekly events on the same. Creating awareness among the children and youth would be of top priority as they will easily understand the issues that we face now and we will be facing in the near future. Planting new trees is as important as looking after the existing ones. So, my volunteers and I would water the plants and trees on a regular basis.

Question 8. Explain how deforestation leads to reduced rainfall.

Solution : Removal of trees and plant life from a particular area for the construction of Industries, Reclamation for agriculture or for other such purposes is termed as Deforestation. Photosynthesis, in plant life, takes place by the absorption of CO2 from the earth’s atmosphere. When the plant life is destroyed, the carbon Dioxide levels in the atmosphere will increase drastically leading to excessive heat radiation trap and, ultimately, Global warming. This rise in temperature will affect the water cycle that exists in nature. Disturbance in the water cycle will lead to a chain of events and in the end, the rainfall pattern changes and results in droughts.

Question 9. Find out one national park from your state. Identify and show their location on the outline map of India.

Solution : Few of the famous national parks in India and their location are as follows:

1. Jim Corbett National Park: It is the oldest national park in India and was established in 1936 to protect the endangered Bengal tiger. It is located in Nainital district of Uttarakhand. Dense moist deciduous forest mainly consists of sal, haldu, peepal, rohini and mango trees. Forest covers almost 73% of the park, 10% of the area consists of grasslands. It houses around 110 tree species, 50 species of mammals, 580 bird species and 25 reptile species

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2. Kaziranga National Park: It is a national park in the Golaghat and Nagaon districts of the state of Assam, India. The sanctuary, which hosts two-thirds of the world’s great one-horned rhinoceroses, is a World Heritage Site. It is a vast expanse of tall elephant grass, marshland, and dense tropical moist broadleaf forests, criss-crossed by four major rivers, including the Brahmaputra, and the park.

includes numerous small bodies of water

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3. Gir Forest National Park: It is a forest and wildlife sanctuarynear Talala Gir in Gujarat, India. Established in 1965, with a total area of 1,412 km2. Its region is the sole home of the Asiatic lion (Panthera leo persica) in the wilderness, and is considered to be one of the most important protected areas in Asia due to

its supported species.

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4. Periyar National Park: It is a protected area near Thekkady in the districts of Idukki, Kottayam and Pathanamthitta in Kerala, India. It is notable as an elephant reserve and a tiger reserve. The park is a repository of rare, endemic and endangered flora and fauna and forms the major watershed of two important. rivers of Kerala, the Periyar and the Pamba

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Question 10. Why should paper be saved? Prepare a list of ways by which you can save paper.

Solution : Paper is used in our day to day life. It takes lots of trees to meet the demand of paper. Trees play a very important role in maintaining the balance of nature. So, we must save paper.

Following are the list of ways by which paper can be saved:

(i) We should recycle the paper.

(ii) We should not throw away paper here and there.

(iii) We should spread awareness regarding the importance of paper.

(iv) We should encourage people for buying recycled paper products.

(v) We should use paper wisely.

Question 11. Complete the word puzzle:


1. Species on the verge of extinction.

2. A book carrying information about endangered species.

5. Consequence of deforestation.


1. Species which have vanished.

3. Species found only in a particular habitat.

4. Variety of plants, animals and microorganisms found in an area.

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Solution :


1. Endangered

2. Red Data Book

5. Deserts


1. Extinct

3. Endemic

4. Biodiversity

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Lacking a solid understanding of scientific principles might have unimaginable repercussions. The NCERT textbook for class 8 science comes highly recommended from a number of different educatorsYou will not only be able to improve your academic performance by using the appropriate combination of NCERT textbooks and NCERT answers for class 8 science chapter 7 but you will also be able to establish a strong foundation in science. The NCERT answers that were generated by the SWC team are among the finest solutions that are currently accessible on the web.

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