NCERT Solutions Class 8 Science Chapter 7

NCERT Solutions for Class 8 Science Chapter 7

Historically, science has been the primary engine of human progress. Science students have shaped our modern world, from our grasp of gravity to cutting-edge medical treatments. The fact that you exist and can read this lesson is all science right now. Science is all around us. It is one of the most important subjects to master.

NCERT Class 8 Chapter 7 Science is Conservation of Plants and Animals. This chapter explains how our planet has changed dramatically in the past few decades. These changes are undesirable and have resulted in issues such as global warming, extinction, and deforestation. Students must become aware of these concerns and take proactive steps to address them.

Every student dreams of excelling in their examination. The easiest way to excel in the exam is to go through all the NCERT Solutions in the chapter. Hence, Extramarks presents NCERT Class 8 Science Chapter 7 Solutions. These NCERT Class 8 Science Chapter 7 solutions help students comprehend all the chapter’s fundamentals. Moreover, these solutions have been prepared by the subject experts at Extramarks.

At Extramarks, students have a variety of resources to choose from. In addition, they can access various study materials for all classes. Material such as NCERT books, CBSE revision notes, CBSE sample papers, CBSE previous year question papers, and much more to explore at the Extramarks website.

Key Topics Covered in NCERT Solutions For Class 8 Science Chapter 7

Mentioning below the key concepts covered in NCERT Solutions for Class 8 Science Chapter 7- Conservation of Plants and Animals:

Deforestation and its Causes
Consequences of Deforestation
Conservation of Forest and Wildlife
Biosphere Reserve
Flora and Fauna
Endemic Species
Wildlife Sanctuary
National Park
Red Data Book
Migration 
Recycling of Paper
Reforestation 

Let us now look at the in-depth information provided by Extramarks on each subtopic in NCERT Solutions for Class 8 Science Chapter 7- Conservation of Plants and Animals. 

Deforestation and its causes

NCERT Solutions for Class 8 Science Chapter 7 defines deforestation as removing trees from forests to destroy the forests. It results in the extinction of countless creatures all over the world. Several more factors contribute to deforestation; some are mentioned below: 

  • Construction of industries and homes
  • Acquiring land for farming
  • A forest fire or a severe drought are examples of natural causes.
  • Making furniture or using wood as fuel

Consequences of Deforestation

Extramarks NCERT Solutions for Class 8 Science Chapter 7 lists some consequences of deforestation as follows:

  • It results in a decrease in groundwater levels.
  • It causes a rise in the global temperature and pollution levels.
  • Deforestation results in an increase in carbon dioxide in the atmosphere.

Drought

Drought is an environmental issue that has severely affected humanity. You may also be aware that droughts are defined as water scarcity in a particular location and these could occur due to a lack of rainfall in that location.

Desertification 

Extramarks’ NCERT Solutions for Class 8 Science Chapter 7 also briefs you about desertification. Desertification is the creation of a desert, as the term implies. It occurs as a result of vegetation erosion. Extreme weather conditions might also contribute to this. It’s also worth noting that numerous human actions, like inappropriate irrigation and deforestation, contribute to terrain desertification.

Conservation of Forest and Wildlife

Now that we have all of the essential facts, we can go on to evaluate different environmental protection methods. Extramarks NCERT Solutions for Class 8 Science Chapter 7 takes you through each of these measures in details.

Biosphere Reserve

The biosphere is the portion of our planet where all living species reside or where life is sustained. The number of creatures that live on the earth is referred to as biodiversity or biological diversity. It also refers to the interactions between such organisms and the interactions between live creatures and their surroundings. A biosphere reversal is just a piece of land free of human interference. The goal of these regions is to safeguard and conserve endangered animals’ lives.

Flora and Fauna

The plants and animals that may be found in a specific location are referred to as the flora and fauna of that place.

Endemic Species

Animals and plants that can only be found in specific locations are called endemic species.

Wildlife Sanctuary

A wildlife sanctuary can be a natural sanctuary, such as an island. However, competition, predation, poaching, and hunting are all hazards to different species, and this location provides crucial protection from all these activities.

National Park

Extramarks’ NCERT Solutions for Class 8 Science Chapter 7 believes it is essential to discuss what fauna and flora are before getting into the concept of national parks. Fauna and flora refer to the plants and animals found in a specific location. Flora is planted, and fauna is animals. Returning to our original matter, a national park is a park dedicated to biodiversity protection. Most of these parks are built and managed by union governments worldwide.

Project Tiger

The Indian government created the Project Tiger initiative. The goal of this effort was to safeguard and conserve India’s dwindling tiger population. Many natural parks have been designated as part of the Project Tiger effort. Governments in other nations have initiated similar initiatives.

Endangered Animals

Endangered animals are those whose populations are dwindling to the point where extinction is a distinct possibility soon.

Ecosystem

An ecosystem consists of all the animals, plants, and microorganisms that reside in each region, coexisting with non-living elements such as a river, soil, deltas, and temperature.

Red Data Book

The red data book is a sourcebook that is notable for keeping track of all the world’s endangered flora and animals.

Migration

In earlier classes, one might have already studied that migration is described as the periodic movement of several animals from one location to another. Breeding or escaping unfavourable climatic conditions are two primary reasons for migration. Many species of birds and fish migrate.

Recycling of paper

The first and most essential action that everyone can take is to recycle paper. According to various figures, the paper industry is the most significant source of deforestation. This is due to the high need for wood pulp in that industry. As a result, if one chooses to recycle paper, fresh wood pulp consumption will be reduced. This would benefit both parties because you could save money while also helping the environment.

Reforestation

Reforestation is another significant action that may be implemented to safeguard the environment. This is an important topic in NCERT Solutions for Class 8 Science Chapter 7. For those unfamiliar with the concept, reforestation is the process of replenishing depleted forests. Plant fresh trees to do this.

NCERT Solutions For Class 8 Science Chapter 7 Conservation of Plants and Animals NCERT Solutions Article Links

Extramarks’ NCERT Solutions are very popular among students. Preparing through the NCERT Solutions is the best way to go forward with preparations. These solutions by Extramarks also meet all the requirements of the students. Click on the below links to view NCERT Solutions for Class 8 Science Chapter 7: 

Class 8 Science Chapter 7: Very Short Answer Type Questions

Class 8 Science Chapter 7: Short Answer Type Questions

Class 8 Science Chapter 7: Long Answer Type Questions

Students may access NCERT Solutions for Class 8 Science Chapter 7 and other chapters by clicking here. In addition, students can also explore NCERT Solutions for other classes below.

By getting access to Extramarks NCERT Solutions for Class 8 Science Chapter 7, students can easily understand the topic of the conservation of plants and animals.

NCERT Solutions Class 8 Science Chapter-wise List

Chapter 1 – Crop Production and Management
Chapter 2 – Microorganisms : Friend and Foe
Chapter 3 – Synthetic Fibres and Plastics
Chapter 4 – Materials : Metals and Non-Metals
Chapter 5 – Coal and Petroleum
Chapter 6 – Combustion and Flame
Chapter 7 – Conservation of Plants and Animals
Chapter 8 – Cell – Structure and Functions
Chapter 9 – Reproduction in Animals
Chapter 10 – Reaching The Age of Adolescence
Chapter 11 – Force and Pressure
Chapter 12 – Friction
Chapter 13 – Sound
Chapter 14 – Chemical Effects of Electric Current
Chapter 15 – Some Natural Phenomena
Chapter 16 – Light
Chapter 17 – Stars and The Solar System
Chapter 18 – Pollution of Air and Water

Key Features of NCERT Solutions For Class 8 Science Chapter 7

NCERT Solutions are a crucial aspect that every student should go through to perform well in their examinations. To grasp the concept of the Conservation of Plants and Animals, Extramarks brings forward NCERT Solutions for Class 8 Science Chapter 7. Mentioned below are some primary reasons why you should choose Extramarks:

  • Going through these solutions is quite time-saving for students, as these solutions help in grasping the concepts and the writing pattern.
  • These solutions have been carefully curated by subject experts at Extramarks, after thorough research and as per the requirements of the students.
  • Extramarks has put together the most crucial information on this topic based on the NCERT guidelines.

Q.1 Fill in the blanks.
(a) A place where animals are protected in their natural habitat is called _______.
(b) Species found only in a particular area is known as ______.
(c) Migratory birds fly to far away places because of ______ changes.

Ans.

(a) A place where animals are protected in their natural habitat is called wildlife sanctuaries.
(b) Species found only in a particular area is known as endemic.
(c) Migratory birds fly to far away places because of climatic changes.

Q.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

Ans.

(a)

Wildlife Sanctuary Biosphere Reserve
An area within which animals are protected from possible dangers, such as hunting Large protected area constructed for the conservation of biodiversity
Provides protection and suitable living conditions to wild animals Helps in the conservation of various life forms, such as plants, animals and micro–organisms

(b)

Zoo Wildlife Sanctuary
A facility in which animals are kept for public presentation An area within which animals are protected from possible dangers, such as hunting
An artificial habitat Conserves the natural habitat of animals

(c)

Endangered species Extinct species
Population of species that is on the verge of becoming extinct Population of species that no longer exists. Hence, it is extinct
Blue whale, tiger, leopard etc. are examples of endangered species. Dodo, passenger pigeon etc. are examples of extinct species.

(d)

Flora Fauna
The term refers to all living plants in a particular area. The term refers to all animals living in a particular area.

Q.3 Discuss the effects of deforestation on the following.
(a) Wild animals
(b) Environment
(c) Villages (Rural areas)
(d) Cities (Urban areas)
(e) Earth
(f) The next generation

Ans.

(a) Wild animals: Deforestation is the removal of trees or other vegetation from an area for industrial, agricultural and other purposes. Trees and other vegetation form the habitat of many animals. Hence, deforestation leads to the destruction of the habitats of wild animals, which in turn decline their population and may become the cause of their extinction.

(b) Environment: Deforestation increases the level of carbon dioxide in the atmosphere, as there would be less number of plants that absorb carbon dioxide from the atmosphere to perform photosynthesis. The increased level of carbon dioxide in the atmosphere will trap more heat radiations, thereby leading to global warming. Naturally, the temperature of the earth will increase. An increase in the temperature of the earth will disturb the natural water cycle, resulting in the change of rainfall pattern. This could lead to floods or draughts.

(c) Villages (Rural areas): Deforestation may result in less rainfall or heavy rains. Less rainfall will lead water scarcity in villages that will decrease the agricultural production. Hence, domestic cattle will have no fodder. Heavy rains will cause floods. Soil erosion caused by deforestation and floods will further adversely affect the agriculture, which will lead to migration of village people to the cities for their livelihood.

(d) Cities (Urban areas): As in the case of villages, deforestation in cities can increase the risk of floods and draughts in that area. In addition to that, vehicular and industrial pollution, increase in the level of carbon dioxide in the atmosphere, lead to global warming.

(e) Earth: Deforestation increases desertification, droughts, floods, etc. Due to deforestation, there will an increases in the temperature of the earth i.e., global warming due to the increased level of carbon dioxide on the earth. As a result, the entire natural water cycle will get disrupted and will increase the threat of natural calamities.

(f) The next generation: Deforestation is responsible for global warming, soil erosion, greenhouse effect, drought, floods and many other global problems. Due to this, our next generation will have to face severe consequences.

Q.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

Ans.

(a) Continuous cutting of trees will completely destroy habitat of many organisms. Cutting of trees will lead to global warming. Global warming will disturb the natural water cycle. As a result, rainfall pattern will be changed, which will further lead to floods or droughts. This will also increase the risk of soil erosion, desertification and natural calamities.

(b) The habitat is a place where an organism gets food, shelter and protection. If the habitat of an animal is disturbed, the animal will be forced to move to other places in search of food and shelter. In this process, the animal might get killed by other animals or unfavourable environmental conditions.

(c) If the top layer of the soil is exposed, it will gradually erode exposing the lower layer of soil, which is less fertile as it contains less humus. Continued soil erosion will make the land barren or infertile.

Q.5 Answer in brief.
(a) Why should we conserve biodiversity?
(b) Protected forests are also not completely safe for wild animals. Why?
(c) Some tribals depend on the jungle. How?
(d) What are the causes and consequences of deforestation?
(e) What is Red Data Book?
(f) What do you understand by term migration?

Ans.

(a) Biodiversity should be conserved to maintain a balance in nature, as each component of biodiversity is dependent on each other for their sustainability.
(b) Protected forests are also not completely safe for wild animals because people living in villages adjacent to the forest use forest resources and kill animals for their flesh, skin, etc.
(c) Tribals are the people that live in forests and are away from the modern life amenities. For their survival, forest is the only source that provides them food items like, grains, fruits, and other products like meat, honey, fodder for their cattle, wood fuel etc.
(d) Causes of deforestation: To meet the demands of increasing human population, urbanisation and industrialisation
Consequences of deforestation: Deforestation will lead to global warming, environmental imbalances like disturbed water cycle.
(e) Red Data Book is the source book which maintains a record of all the endangered animals and plants.
(f) Migration is the phenomenon of movement of a species from its habitat to other habitat for a particular time period in a year for a specific purpose, like breeding.

Q.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? Discuss and prepare a brief report.

Ans. No, it is not at all justified to cut trees to meet the ever increasing demands of human population. Forests are the habitats of several organisms, including wild animals. They help in maintaining a balance between oxygen and carbon dioxide in nature and hence, keep a check on the temperature of the earth. In the process, they prevent the excessive heating of the atmosphere. They prevent soil erosion to a large extent and natural calamities, such as floods and droughts. They increase the fertility of the soil and help in conserving biodiversity. The cutting of forests to large extent will cause global warming, soil erosion, greenhouse effect, droughts, floods, and many more problems. Hence, forests must be conserved to maintain a balance in nature.

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

Ans. My contribution in the maintenance of green wealth of my locality will be:

  1. By taking care of the plants and trees growing in or around my locality
  2. By planting more and more trees
  3. By encouraging people of my locality to plant more trees
  4. By informing people about the importance of growing trees
  5. By educating people and young children about the effects of deforestation on our environment and on our planet

Q.8 Explain how deforestation leads to reduced rainfall.

Ans. Deforestation causes an increase in the level of carbon dioxide. The high levels of carbon dioxide in the atmosphere will trap more heat radiations, causing global warming. Due to an increase in the temperature of the earth, water cycle will get disturbed. As a result of this, the rainfall pattern will be changed. The reduced amount of rain will then cause droughts.

Q.9 Find out about national parks in your state. Identify and show their location on the outline map of India.

Ans. I live in New Delhi. There is no national park in New Delhi. One of the national parks located near Delhi is the Jim Corbett National Park.

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

Ans. Paper should be saved because it takes around seventeen full grown trees to make 100 kg of paper. Trees help in maintaining a balance of nature. Therefore, saving paper is a way to save trees and prevent the impact of their loss on living organisms.

Ways by which paper can be saved are as follows:

  1. Recycling of used paper.
  2. Writing on both the sides of a paper
  3. Educating people about the importance of paper
  4. Using of information technology to save printed data in digital form

Q.11 Complete the word puzzle.
Down
1. Species on the verge of extinction.
2. A book carrying information about endangered species.
5. Consequence of deforestation.

Across
1. Species which have vanished.
3. Species found only in a particular habitat.
4. Variety of plants, animals and microorganisms found in an area.

Ans.

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FAQs (Frequently Asked Questions)

Conservation is primarily concerned with preventing creatures from becoming extinct. It also ensures habitat preservation and restoration and the enhancement of ecosystem services to protect biological diversity. Refer to the Extramarks website as it provides a comprehensive explanation of conservation.

Trees have leaves that transpire and release moisture in the atmosphere. This moisture in turn condenses and results in cloud formation and rainfall.

Deforestation leads to reduction of trees which in turn leads to reduction in the transpiration and water hence much reduced cloud formation and thus decrease in rainfall. 

This in turn leads to less water absorption in soil. The soil will dry which leads to decreased water intake in trees leading to soil erosion and at last leads to floods.