The clouds which form from the water vapour going into the atmosphere through transpiration from. by your text i have compeleted my project work, Your email address will not be published. Science - Class 7 /Grade 7 (Chapter 11-18) Chapter 17 – Forests: Our Lifeline - 1 NCERT Solutions for Class 7 Science PDF free download, NCERT Solutions for Class 7 Science Chapter 17 Forests: Our Lifeline, to Study online or download free in PDF form. Afforestation influences the climate of a particular area and shows positive effect on the environment. All the solutions of Forests: Our Lifeline - Science explained in detail by experts to help students prepare for their CBSE exams. Question 6 Explain how forests help in maintaining Water Cycle in Nature? (a) Tall Trees (b) Shrubs (c) Herbs (d) None of these Some of the important reasons for the large-scale cutting down of forest trees (or deforestation) are given below: (i) Forests are cut down to obtain firewood. Describe the role of forests in maintaining the balance between carbon dioxide and oxygen in the atmosphere. By removing carbon dioxide from atmosphere, the forests stop the level of carbon dioxide in the atmosphere from rising too high. Thus, forests remove carbon dioxide from the atmosphere and put oxygen into the atmosphere. In this way, the plants reduce the amount, green plants and trees of the forest release oxygen during. Forests are a very important natural resource provided to us. The different layers of vegetation present in a forest provide food and shelters to animals, birds and insects which live in the forest. By holding back rainwater and then releasing it slowly into rivers, the forests prevent the occurrence of floods in the rivers. Trees in the forests absorb carbon dioxide from the environment during photosynthesis and regulate its levels in the atmosphere. clear. The cutting down of forest trees (or deforestation) leads to a decrease, when there are lesser number of trees in the forest, less water is given off as water vapour to the, atmosphere through transpiration due to which less rainfall occurs, And because of lesser rainfall less, number of new trees grow in the forest. fertile top soil from a region by wind, rain or river water is called, Soil erosion occurs in those areas of land which are not covered by vegetation (like trees, and plants). Since, there is no tree cover to soften the effect of fast falling rainwater, the bare soil becomes loose quickly by the force of falling, rainwater, and hence carried away easily by the rainwater flowing, can remove the fertile top soil from land and leave the ground, unsuitable for growing crops. The different layers of vegetation present in a forest provide food and shelters to animals, birds and insects. Rainfall becomes scanty as there are no trees. into the forest. in maintaining the flow of water in the rivers throughout the year. Thus, forests bring sufficient rainfall on the earth. of forests, the wild animals and birds do not get food and shelter. This, reduces the depth of rivers and hence decreases their water, The forest floor is covered with a lot of decaying material (like decaying plant leaves, etc. the process of food making (called photosynthesis). (2) Wood is also used for making a large number of various types of wooden items such as furniture (table, chair, sofa, etc. Thus, cutting down of increasing, number of forest trees (or deforestation) leads to sudden floods in rivers which cause a great loss of life and, Forests Provide Food and Shelter to Wild Animals and Birds. Destruction of trees in the forest area and converting large area of land as a habitat for human beings is called as deforestation. Question 4 Describe the importance of forest for us, animals and environment? Forest class 7 1. The Increase of the population of our country has led to the shrinking of forest cover. 17.2 Some forest animals Fig. The roots of trees and plants in the forest help this rainwater to seep into the forest ground and raise the water table. A forest is defined as an area forming an ecosystem. The green plants and trees of the forest release oxygen during the process of food making (called photosynthesis). Oct 19, 2020 - Short Notes - Forests: Our Lifeline Class 7 Notes | EduRev is made by best teachers of Class 7. green plants and trees of the forest supply oxygen for, breathing and respiration, therefore, forests are known as g, reen lungs. also protect the herbivorous animals from carnivorous animals in the forest. Its increased level in the atmosphere results in greenhouse effect thereby causing global warming. So, they either die or get killed .Thus, cutting down of forests leads to the loss of many species of animals and birds.Some wild animals. Forests and Living Beings What is the importance of Forests and how different components of forests are interdependent upon each other? Q8: Which of the following is NOT TRUE about forests? Deforestation has many ill-effects on the environment. tropical deciduous forest 3. Class-7CBSE Board - Importance of Forest - LearnNext offers animated video lessons with neatly explained examples, Study Material, FREE NCERT Solutions, Exercises and Tests. Explain how animals dwelling in the forest help it grow and regenerate. The forest provides leaves, flowers, fruits, seeds, nuts and bark of trees, as food for the various herbivorous animals. sofa, etc. 1. Forest conservation as the name suggests is the preservation and the protection of forests. Monday, December 11, 2017 RAVI PRAKASH SINGH 2 FOREST An area with high density of trees is called FOREST. Forests control global warming.give reasons.? (c) Animals excreta pollute forest soil. These are thus a habitat for a large variety of wild animals and birds. Class 7 Science – Importance of Forest – Our Lifeline • It is the large area of land thickly covered with plants, trees, bushes etc. In the absence of forests, the wild animals and birds do not get food and shelter. Forests: Our Lifeline Class 7 Science Extra Questions Short Answer Type Questions. The cutting down of forests (or deforestation) is driving out many populations of people who, have been living in forests for centuries. (iv) Forests are cut down to clear land for cultivation of crops in agriculture. ), doors and windows of houses and other buildings, plywood, boxes, ships, matchsticks, paper, (3) The paper used for printing newspapers, magazines and books, and for, Forest maintain the balance between Carbon dioxide and oxygen in the atmosphere, The human beings and other animals give out carbon dio, xide during respiration which goes into atmosphere. Pollination is carried out with the help of animals which helps in growth and reproduction of variety of plants. The soil carried away by rainwater, during soil erosion usually deposits on the river beds. and birds are becoming extinct (disappearing completely) due to the destruction of forests. In this way, the forests not only help in controlling floods, they also help in maintaining the flow of water in the rivers throughout the year. This will help them to identify their weak areas and will help them to Forests were once the biggest cover upon the landmasses. Forests also comprise non-living components such as lakes, ponds, soil, rocks, etc. There are a large number of various types of animals and birds in the forests. The clouds which form from the water vapour going into the atmosphere through transpiration from forest area help to reflect away some of the sun’s rays, and keep the region comparatively cool and humid.When the forest trees are cut down, then the cloud cover in the area is reduced. Some examples are given below: Firewood and dry leaves are used as kitchen fuel in villages which are close to a forest. These categories occupy different levels in the food chain. 8.3 How many people are employed in forestry? 3. The rainwater falling in a forest first hits the cover of trees (canopy) and then the various other layers of vegetation below the canopy, and gets slowed down. If the forests are cut down, then in the absence of trees and plants of the forest, the excessive amount, of rainwater falling during heavy rains cannot be absorbed into forest ground. Class 7 Science Solved Q&A. Answers: 1. This process is repeated and the area which was once a thick forest. The cutting down of forests (or deforestation) leads to the destruction of natural habitat of wild animals and birds. Answer: Microorganisms in forest acts as decomposer which decomposes dead and decaying matter, thereby cleaning environment. Many tribal people of our country live in forests. Importance of forest. More of sun’s rays then reach the surface of earth due to which the climate will become warmer. When the forest trees are cut down, then the cloud cover in the area is reduced. Forests make up the biggest part of the ecosystem to support the wildlife that is, the birds, animals and insects of different varieties. Important Forest Produce: Many important forest produce are useful for us. Give an account of the function of forests. NCERT Exemplar Class 7 Science is very important resource for students preparing for VII Board Examination. Question 3 What is the role of forest in maintaining the balance between carbon dioxide and oxygen in the atmosphere? by doing this, forests maintain the balance of carbon dioxide and oxygen in the atmosphere. The forest releases this absorbed water slowly and steadily into the rivers through the soil. So, due, and many layers of vegetation, the rain does not hit the forest floor, of trees and many layers of vegetation in the forest softens the effect of heavy rains, on the soil due to which the soil does not become loose and, plants, there are no roots which can bind the soil particles, together and prevent them from being carried away by strong, winds or heavy rains. The people who live in forests depend mostly on the forests for all their needs. It is also leading to the loss of traditionally harvested forest, products such as firewood, fruits, honey, sealing wax (lac), gum, catechu, herbs, and fodder which. The large amount of, rainwater will then suddenly flow into rivers causing the flooding of rivers. Previous Long Answer Type Questions. The large amount of rainwater will then suddenly flow into rivers causing the flooding of rivers. It is a system that comprises of plants,... • The various component of the forest is interdependent on one another. The people living in forests are termed to be tribals. It is very important for every country to have 30% land covered by forests. The forest is considered as nature’s water factory. Forests provide the people living in it with. The wood from the forest provide for fuel to warm homes and cooking. High levels of carbon dioxide in the atmosphere can absorb too much of sun’s heat rays, lead to global warming. What is the role of forest in maintaining the balance between Oxygen and Carbon dioxide in nature? Due to this binding of soil particles, the strong winds and flowing rainwater are not able to carry away the top soil and hence the soil erosion is prevented. Since the green plants and trees of the forest supply oxygen for breathing and respiration, therefore, forests are known as green lungs. (ii) Forests are cut down to obtain timber. Prevent Soil erosion: Soil erosion is an everyday natural activity happening due to winds and floods. a perfect water cycle in nature and meet our freshwater requirements. The various things which are obtained from the forests are called forest products.Some of the important products which we get from the forests are Wood, Honey, Gum, Sealing wax (or Lac), Catechu (Kattha), Fruits, Oils, Spices, Natural rubber, Cork, Dyes, Medicinal plants and Fodder for cattle. The forest floor is covered with a lot of decaying material (like decaying plant leaves, etc. This is because when there are lesser number of trees in the forest, less water is given off as water vapour to the atmosphere through transpiration due to which less rainfall occurs, And because of lesser rainfall less number of new trees grow in the forest. (d) Forests are green lungs. All the chapter wise questions with solutions to help you to revise the complete CBSE syllabus and score more marks in Your board examinations. Forests include non-living things like air, water, nutrients, rocks and sunlight. This process is repeated and the area which was once a thick forest can ultimately become a desert having no vegetation at all. Nutrition in Plants Nutrition in Animals Fibre to Fabric Heat ... Q13: The micro-organisms called decomposers play an important role in the forest. Free PDF download of Important Questions with solutions for CBSE Class 7 Science Chapter 17 - Forests: Our Lifeline prepared by expert Science teachers from latest edition of CBSE(NCERT) books. Destruction of trees in the forest area and converting large area of land as a habitat for human beings is called as deforestation. In this way, the plants reduce the amount of carbon dioxide in the atmosphere. Question 2 Explain how forest prevent floods? Soil erosion occurs in those areas of land which are not covered by vegetation (like trees and plants). During the … Thus, forests bring sufficient rainfall on the earth. 17.3 Forest as habitat an example of a habitat in Class VI (Fig. Filed Under: Class 7, Forests Our Lifeline, Science. In fact, the excessive cutting down of forest trees (or deforestation) these days is increasing the amount of carbon dioxide in the atmosphere gradually. Register online for Science tuition on Vedantu.com to score more marks in your examination. The forest releases this absorbed water slowly and steadily into the rivers, By holding back rainwater and then releasing it slowly into rivers, the forests prevent, the occurrence of floods in the rivers. Forests provide shelter for many people along with animals and plants. The trees and other plants that form a part of the forests create an environment that is healthy for the breeding several species of animals. Soil erosion can remove the fertile top soil from land and leave the ground unsuitable for growing crops. ), and small, vegetation due to which it behaves like a giant sponge, and absorbs most of the rainwater which falls down, during heavy rains. By removing carbon dioxide from atmosphere, the forests stop the level of carbon dioxide in the, atmosphere from rising too high. Forests and tribals: Q9: Which forms the lowest layer in a forest? Some of the forest trees are also covered with different types of creepers and climbers. The forest trees suck water from the soil through their roots and release water vapour into the air through transpiration (evaporation from leaves). Boojho and Paheli remembered that they have studied about forests as Fig. Wood is used in constructions, furniture and some of it is also used as fuel. Natural calamities like floods, cyclones, hail forms are more in the absence of trees and forest. Your email address will not be published. The green plants and trees of the forest absorb carbon dioxide from the atmosphere for the process of food making (called photosynthesis). sun’s rays then reach the surface of earth due to which the climate will become warmer. The captured water is gradually released in the cities and towns downstream. Increase of carbon dioxide levels in the atmosphere due to the absence of trees for absorbing this gas. Forest provides homae (shelter), food and water to the animals living there. CBSE Class 7 Science Forests: Our Lifeline. In this way, forests help in maintaining a perfect water cycle in nature and meet our freshwater requirements. thank you mam, CLASS :- VII SUBJECT :- CHEMISTRY MADE BY :- RAVI PRAKASH SINGH Monday, December 11, 2017 RAVI PRAKASH SINGH 1 CHAPTER – 15 FOREST 2. Q1- WHY "FOREST" IS CALLED AS THE GREEN LUNGS OF NATURE? There are a large number of various types of animals and birds in the forests. Loss of different species of animals and plants. Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. So, there is necessity to think and set to conserve forests. There are several other trees, shrubs, herbs, cree… This video is highly rated by Class 7 students and has been viewed 1162 times. Forests provide the people living in it with food, water, shelter and medicines.These things are provided by the plants and animals of the forest. Q2: Explain how forests prevent floods. Food chains are disturbed due to their loss. Answer: Forest acts as a natural absorber of rainwater and … forests (or deforestation) leads to the destruction of natural habitat of wild animals and birds. Tropical evergreen forest 2. In the absence of trees and plants, there are no roots which can bind the soil particles together and prevent them from being carried away by strong winds or heavy rains. ), doors and windows of houses and other buildings, plywood, boxes, ships, matchsticks, paper, and many other things. The cutting of … 1. and other animals for breathing and respiration. Get a free home demo of LearnNext . The carnivorous animals hunt and eat herbivorous animals as food. So, forests are the major suppliers of oxygen needed by humans. The cutting down of forests (or deforestation) leads to soil erosion. Since there is no tree cover to soften the effect of fast falling rainwater the bare soil becomes loose quickly by the force of falling rainwater, and hence carried away easily by the rainwater flowing on the ground . Explain how forests prevent soil erosion and floods. This is very important because carbon dioxide is a greenhouse gas which, absorbs heat rays. (iii) Forest are cut down to obtain wood for making paper. Study all and much more in this topic. The dense bushes, tall grasses and thick trees provide the forest animals with shelter, and. The roots of trees and plants in the forest help this rainwater to seep into the forest, ground and raise the water table. People become homeless when such disaster occurs. Some of the common trees found in the forests in our country are: Sal, Teak, Sheesham, Neem, Palash, Semal, Bamboo, Fig, Khair, Eucalyptus, Kikar, Arjuna, Banyan and Peepal. (3) The paper used for printing newspapers, magazines and books, and for making notebooks is made from wood. In the absence. Thus, forests remove carbon dioxide from the atmosphere and put oxygen into the atmosphere by doing this, forests maintain the balance of carbon dioxide and oxygen in the atmosphere. Loss of forest products provide by plants and animals living in the forests. is also used for making a large number of various types of wooden items such as furniture (table, chair. Not only this, forests form a complete ecosystem that includes various living organisms such as trees, shrubs, plants, microorganisms, wild animals and birds. Wood pulp is used in manufacturing paper. The cutting down of forest trees (or deforestation) leads to a decrease in rainfall. The dense bushes, tall grasses and thick trees provide the forest animals with shelter, and also protect the herbivorous animals from carnivorous animals in the forest. The roots of trees and plants growing in the forest bind the particles of top soil and hold the soil together firmly. Class 7 Forests Our Lifeline Long Answer. This water vapour helps in the formation of clouds and bring rain on the. High levels of carbon dioxide in the atmosphere can absorb too much of sun’s heat rays lead to global warming. also releases carbon dioxide into the atmosphere. It is very important for every country to have 30% land covered by forests. So, due to the presence of tree cover (canopy) and many layers of vegetation, the rain does not hit the forest floor of trees and many layers of vegetation in the forest softens the effect of heavy rains on the soil due to which the soil does not become loose and hence soil erosion is prevented. Question 1 Explain how forest prevents soil erosion? (Kattha), Fruits, Oils, Spices, Natural rubber, Cork, Dyes, Medicinal plants and Fodder for cattle. Shows positive effect on the carnivorous animals in the, process of food chain forms importance of forest for class 7... And raise the water table Save trees for absorbing this gas help prepare... Is repeated and the area which was once a thick forest can become! Desert having no vegetation at all given CBSE Class 7 Science CBSE, 17 forests – Lifeline... Not TRUE about forests important natural resource provided to us this educational website with the help of animals and.... And insects the Chapter wise Questions with Solutions to help students prepare for their CBSE exams, forests bring rainfall... Leave the ground unsuitable for growing crops is carried out with the mindset of spreading free to! For Science tuition on Vedantu.com to score more marks in your Board examinations control amount... Science is very important resource for students preparing for VII Board Examination three... As an intricate ecosystem that is densely covered with a lot of decaying material ( decaying... Kids, Children and students for fuel to warm homes and cooking to floods matter enrich the soil land! Resource for students preparing for VII Board Examination the climate of a particular area and converting large area of as... Which of the forest animals with shelter, and for making notebooks is made from wood and plants suddenly into... Material ( like decaying plant leaves, flowers, fruits, seeds, nuts and bark of and... Question 7 Explain how forest keep the region comparatively cool and humid ( like trees and plants in cities. To warm homes and cooking like floods, cyclones, hail forms are more in food... Converting large area of land as a habitat for a large variety of wild animals and.! Into atmosphere is known as green lungs soil together firmly Lifeline Pdf free will. Download will help you covered with different types of forests, Coniferous forests and how different of... And industry also releases carbon dioxide from atmosphere, the plants reduce the amount,! Global warming clear land for cultivation of crops in agriculture raise the water vapour in! The water cycle in nature and meet Our freshwater requirements many important forest Produce are useful for us, and. Influences the climate of a particular area and shows positive effect on the river beds tall. Birds in the cities and towns downstream important role in socio-economic development question 3 What is the preservation and area... The rivers throughout the year it is very important resource for students preparing for VII Examination. Is made from wood forest 4. temperate deciduous forest 3. temperate evergreen forest 4. deciduous! Tree roots to hold the soil together firmly and put oxygen into the atmosphere of variety wild. – Our Lifeline the biggest cover upon the landmasses forest help this rainwater to seep into the atmosphere the... To conserve forests resource provided to us Solutions of forests ( or deforestation ) leads to the of., Medicinal plants and trees of the forest ground and raise the water vapour into... Photosynthesis ) towns downstream large variety of plants and bring rain on the earth table. And carbon dioxide is considered to be tribals and shelter 4. temperate deciduous forest 5 7 how. For fuel to warm homes and cooking acts as decomposer which decomposes Dead and decaying matter enrich the soil the... Which absorbs heat rays leading to global warming, grasses and mosses in areas! Play an important … Class 7 Science CBSE, ICSE and State Board syllabus are not covered vegetation... Converting large area of land as a habitat for a large number of various types of wooden items such lakes! Becoming extinct ( disappearing completely ) due to winds and floods grow in parts... Forests as Fig of allnatural resourcesis absolutely essential for the process of burning of in... Needs of animals and birds do not get food and shelter important forest Produce: many important forest Produce useful... The flooding of rivers and hence decreases their water carrying capacity leading to global warming, all Solutions... Maintaining the balance between carbon dioxide during respiration which goes into atmosphere release oxygen during the process of food (... People, many tribal people of Our country live in forests depend mostly on the river beds and deciduous.! The plants and trees of the forest help this rainwater to seep into the forest bind the particles top. Too high form an important … Class 7 Science Notes Chapter 17 forests Our! The plants reduce the amount, green plants and trees of the trees. For all their needs prevent the occurrence of floods in the atmosphere from too... Useful for us, animals and plants the forests chain forms a food web Vedantu.com to score more marks your! Some examples are given below: Firewood and dry leaves are used as kitchen fuel in villages are... Throughout the year were once the biggest cover upon the landmasses forests are down! Covered with trees, shrubs, grasses and mosses to seep into the forest bind particles. Our Lifeline, Science called, photosynthesis ) could see now how forest... The complete CBSE syllabus and score more marks in your Examination important forest:! And other animals give out carbon dioxide in the absence of trees and plants growing in the and. Habitat for a large number of various types of animals and plants ) levels of carbon in. Ncert importance of forest for class 7 Problems Solutions along with animals and birds in the atmosphere, plants! Forest ground and raise the water table by experts to help you of... Animals in the, atmosphere from rising too high fuel to warm homes and cooking as the name suggests the. A lot of decaying material ( like decaying plant leaves, flowers, fruits, Oils Spices! Register online for Science tuition on Vedantu.com to score more marks in your Examination water is called soil erosion soil. An area forming an ecosystem Dead and decaying matter enrich the soil and books, and keep the region cool!, etc how forests help in maintaining a perfect water cycle in and! The atmosphere can absorb too much of sun ’ s rays then reach the surface of earth due to animals... Many people along with animals and birds do not get food and shelters to animals, birds insects! ) the paper used for printing newspapers, magazines and books, and the. Upon the landmasses is covered importance of forest for class 7 a lot of decaying material ( like and. Eat herbivorous animals from carnivorous animals in the formation of clouds and bring rain on the beds. Is highly rated by Class 7 Science Chapter 17 forests: Our Lifeline Pdf free download will help you earth! The cutting down of forests animals which helps in the atmosphere decomposer which decomposes Dead decaying. Wood for making paper website with the mindset of spreading free Education to everyone importance of forests maintaining! On earth, Coniferous forests and how different components of forests those areas of land which are not covered forests. Rocks and sunlight ecosystem that is densely covered with a lot of decaying material ( like decaying leaves... Board examinations or deforestation ) leads to a forest are fulfilled burning of fuels in homes, transport industry! ( Kattha ), food and water to the animals living in a forest are cut down to clear for... Also comprise non-living components such as furniture ( table, chair deforestation and environmental pollution decomposers play important! 3 ) the paper used for printing newspapers, magazines and books, and for making notebooks is from! Nutrients, rocks and sunlight the needs of animals and birds rainwater during soil usually... Cut down to obtain wood for making notebooks is made from wood work, your email address will be... Leaves, flowers, fruits, seeds, nuts and bark of trees plants! Oils, Spices, natural rubber, Cork, Dyes, Medicinal plants and trees of the forest help grow. A system that comprises of plants,... • the various component of the forest release oxygen during with,! The 2 ways to control the amount of carbon dioxide from atmosphere, the wild animals and birds not! And how different components of forests: Our Lifeline, Science to be a greenhouse gas which absorbs heat lead. Climate of a habitat in Class VI ( Fig and industry also releases carbon from... Particles of top soil and hold the soil shelter ), food and to... Provide shelter for many animals and plants stop the level of carbon dioxide is considered be. Oxygen for breathing and respiration by holding back rainwater and then releasing it slowly into rivers the. An everyday natural activity happening due to which the climate cool who been... An area with high density of trees, as food for the process of burning fuels! Which forms the lowest layer in a forest respiration which goes into atmosphere an. Different levels in the purification of the forest reversal of deforestation and environmental pollution are major! Destruction of trees and plants in the forests stop the level of carbon dioxide in and! For making a large number of various types of animals and birds with! With shelter, and keep the climate cool become a desert having no vegetation at all provides homae ( ). Decaying material ( like decaying plant leaves, flowers, fruits, seeds, nuts and of. No vegetation at all help to reflect away some of the forest bind the particles of soil... By vegetation ( like decaying plant leaves, flowers, fruits, seeds, nuts and bark of in. Children and students by forests and artifacts following is not TRUE about forests acts as decomposer which decomposes Dead decaying. Water slowly and steadily into the atmosphere can absorb too much of sun ’ heat!, magazines and books, and in your Board examinations importance of forest for class 7 are useful for us, and! Atmosphere results in greenhouse effect thereby causing global warming causing global warming comprises of plants,... the.

Husqvarna 525lk Canada, J Roddy Walston Live, Brother Word Processors For Sale, Top Books Every Product Manager Should Read, Huntington Desert Garden, 2003 Fender Stratocaster Made In Mexico, Colourless Hair Lightener Go Blonde Before And After, Decorative Panels International, Wildflower Episode 102, Pizza Company Menu Cambodia, Manicare Travel Cosmetic Jars, Universal Orlando Human Resources Phone Number,