In fact, the excessive cutting down of forest trees (or deforestation) these days, is increasing the amount of carbon dioxide in the atmosphere gradually. In this way, the plants reduce the amount of carbon dioxide in the atmosphere. All the solutions of Forests: Our Lifeline - Science explained in detail by experts to help students prepare for their CBSE exams. Thus, forests bring sufficient rainfall on the earth. Food chains are disturbed due to their loss. The carnivorous animals hunt and eat herbivorous animals as food. During the … Carbon dioxide is considered to be a greenhouse gas. Loss of different species of animals and plants. 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. Forests form an important … This water vapour helps in the formation of clouds and bring rain on the earth. temperate evergreen forest 4. The large amount of rainwater will then suddenly flow into rivers causing the flooding of rivers. The roots of trees and plants growing in the forest bind the particles of top soil and hold the soil together firmly. 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. The forest trees suck water from the soil through their roots and release water vapour into the air through transpiration (evaporation from leaves). Question 3 What is the role of forest in maintaining the balance between carbon dioxide and oxygen in the atmosphere? 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. Download free printable assignments worksheets of Science from CBSE NCERT KVS schools, free pdf of CBSE Class 7 Science Forest Assignment chapter wise important exam questions and answers CBSE Class 7 Science -Forest. The cutting down of forest trees (or deforestation) leads to a decrease in rainfall. 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. Register online for Science tuition on Vedantu.com to score more marks in your examination. More of. All the chapter wise questions with solutions to help you to revise the complete CBSE syllabus and score more marks in Your board examinations. Soil erosion occurs in those areas of land which are not covered by vegetation (like trees and plants). Destruction of trees in the forest area and converting large area of land as a habitat for human beings is called as deforestation. (a) Tall Trees (b) Shrubs (c) Herbs (d) None of these The different layers of vegetation present in a forest provide food and shelters to animals, birds and insects which live in the forest. 2. ), 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. in maintaining the flow of water in the rivers throughout the year. NCERT Solutions for Class 7 Science Chapter 17 Forests – Our Lifeline. Not only this, forests form a complete ecosystem that includes various living organisms such as trees, shrubs, plants, microorganisms, wild animals and birds. Question 4 Describe the importance of forest for us, animals and environment? The people living in forests are termed to be tribals. clear. Class 7 Forests Our Lifeline Long Answer. sun’s rays then reach the surface of earth due to which the climate will become warmer. Available for CBSE, ICSE and State Board syllabus. Some of the forest trees are also covered with different types of creepers and climbers. Forests are valuable resources. A forest is defined as an area forming an ecosystem. Prevent Soil erosion: Soil erosion is an everyday natural activity happening due to winds and floods. Forests also comprise non-living components such as lakes, ponds, soil, rocks, etc. Forests are of great importance to mankind. Many tribal people of our country live in forests. The roots of trees and plants in the forest help this rainwater to seep into the forest ground and raise the water table. of forests, the wild animals and birds do not get food and shelter. The cutting down of forests (or deforestation) leads to soil erosion. In the absence. 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