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Chapter 17 – Forests – Our Lifeline

The following Topics and Sub-Topics are covered in this chapter and are available on MSVgo:


Forest is the dense collection of plants, trees, and other vegetation, inhabited by flora and fauna alike. Forests are an essential part of the natural habitat. They are abundant in all the resources required to live a normal life. The early human beings used to dwell in the forests. They could find everything in the forests necessary to survive, such as using fruits or animals to eat and leaves to cover their body for clothes. But, with time, people started cutting forests to make a place for living. 

Forests are crucial for our ecosystem as they help us in different ways, such as cleaning the air, helping in rainfall, protecting soil from erosion, and much more. With forests, life is possible on this earth, making forests our lifeline.

Now, many live in cities far away from the forests. Many of you must not have yet seen a forest. You should plan a visit to a forest and experience its beauty. Let us try to understand more about forests.

Forest profile consists of different layers of formed vegetation. These layers are as below:

  1. Emergent Layer
    It is the topmost layer of the forest. The emergent layer consists of large trees that grow higher than the general canopy.
  2. Canopy Layer
    It is the topmost layer in the forests. The canopy layer consists of top branches and leaves of tall trees, which act as the roof to the forest floor
  3. Understory Layer
    he Understory layer lies between the forest floor and canopy layer. It is also called a shrub layer due to the presence of shrubs in this layer.
  4. Forest Floor
    The vegetation present at the forest floor layer consists of lichens, mosses, and liverworts. This layer is also the home of worms, insects, toads, etc. A sizable amount of space in the forest gets covered by decaying plant materials and waste excreted by animals.

Below are the main components of the forest:

    • Plants: Green plants, also called autotrophs, produce food for themselves using photosynthesis. Also, they provide food to animals living in the forest. That is why they are called food producers.
    • Animals: There are various types of animals living in the forest. The plant-eater animals are also known as herbivores. On the other hand, the animals which eat flesh are called carnivores. All types of animals, also called heterotrophs, have to rely upon other animals or plants for their food.
    • Decomposers: Decomposers are the microorganisms that decay the dead bodies of plants and animals. Hence, these are also called saprotrophs. These include bacteria and fungi. They are a crucial part of the food chain that frees the earth by decomposing the dead bodies.
    • Scavengers: Scavengers are animals, which are dependent upon the dead animals for their food. These include vultures, hyenas, jackals, and insects, such as maggots, earthworms, beetles, and ants. They are different from decomposers as they eat the dead bodies and decomposers decay them.

Below are the reasons that make forests our lifeline:

    • Provide Useful Products: Forests provide a large number of useful products. These products include fruits, nuts, wood, honey, rubber, spices, sealing wax, gum, and much more. Wood is the most important forest product, which is used by human beings for different purposes.
    • Maintain Balance of Carbon Dioxide and Oxygen: Plants absorb carbon dioxide from the air to use for photosynthesis and release oxygen, which gets inhaled by living beings. Forest maintains the balance between carbon dioxide and oxygen and works like lungs. If the amount of carbon dioxide increases, it may increase the temperature of the earth.
    • Maintains Water Cycle: The trees intake water from the soil through their roots and release it into the atmosphere through transpiration. These vapours help to bring rain, so the forests are the best source of rainfall on the earth.
    • Prevent Flood Occurrence: Forests are the natural absorber of rainwater. They not only maintain the flow of the water but also control the floods. The roots of the trees bind the soil particles together, therefore, save soil from erosion. 
    • Habitat for Animals: Forests are home to many animals. They provide natural habitats to animals where they can live, sleep, and eat.
    • Regeneration: The dead bodies of animals and plants, decomposed by decomposers, are converted to humus that gets absorbed in the soil. It makes the soil fertile. The seeds of various plants carried by animals, birds, wind, etc., reach the soil, where these seeds germinate and new plants grow. So, forests regenerate themselves.

We cut forests to obtain the forest wood. Also, deforestation is carried out to avail the space for human dwell. But, it is necessary to grow trees too, because if we keep on cutting the trees, then forest products will be scarce. Below are the ways to conserve forests:

    • The government should restrict excessive deforestation.
    • We should plant more trees than we cut.
    • The paper products should get recycled.
  1. Why are forests our lifeline?
    Forests are our lifeline because they form an essential part of our ecosystem. They provide us with oxygen to inhale, absorb carbon dioxide, and provide food and other useful products.
  2. What are the uses of the trees?
    Forests have many uses. Some of them include rainfall, avoiding soil erosion and flood, giving oxygen and removing extra CO2 from the air, and giving food and other useful products to humans and animals. 
  3. What is a food chain?
    It is a series of organisms, where the organism above in the series eats the one below in the series. 
  4. What are autotrophs?
    Autotrophs are those who produce their own food. 
  5. How plants make their food?
    Plants make their food using a phenomenon called photosynthesis.

Forests are our lifeline because, without forests, life is not possible on this earth. To know more about forests and their uses, watch video lessons on MSVgo and get into the depth of the advantages of forests.

High School Physics

  • Alternating Current
  • Atoms
  • Communication Systems
  • Current Electricity
  • Dual nature of Radiation and Matter
  • Electric Charges and Fields
  • Electricity
  • Electromagnetic Induction
  • Electromagnetic Waves
  • Electron Beams and Radioactivity
  • Electrons and Photons
  • Electrostatic Potential and Capacitance
  • Fluid Pressure
  • Force and Acceleration
  • Force And Laws Of Motion
  • Gravitation
  • Internal Energy
  • Kinetic Theory
  • Law of motion
  • Light – Reflection And Refraction
  • Magnetic Effects Of Electric Current
  • Magnetism and Matter
  • Management Of Natural Resources
  • Mechanical properties of Fluids
  • Mechanical properties of Solids
  • Motion
  • Motion in a plane
  • Motion in a straight line
  • Moving Charges and Magnetism
  • Nuclear Energy
  • Nuclei
  • Oscillations
  • Our Environment
  • Paths of Heat
  • Physical world
  • Ray optics and optical instruments
  • Semiconductor Devices
  • Semiconductor Electronics: Materials, Devices and Simple Circuits
  • Simple Machines
  • Sound
  • Sources Of Energy
  • Specific and Latent Heats
  • Spherical Mirrors
  • Static Electricity
  • Systems of Particles and Rotational motion
  • Thermal properties of matter
  • Thermodynamics
  • Units and Measurement
  • Vectors, Scalar Quantities and Elementary Calculus
  • Wave Optics
  • Waves
  • Work, Power and Energy

High School Chemistry

  • Acids, Bases and Salts
  • Alcohols, Phenols and Ethers
  • Aldehydes, Ketones and Carboxylic Acids
  • Aliphatic and Aromatic Hydrocarbons
  • Alkyl and Aryl Halides
  • Amines
  • Analytical Chemistry 
  • Atomic Structure
  • Atoms And Molecules
  • Basic concepts of Chemistry
  • Biomolecules
  • Carbon And Its Compounds
  • Carboxylic acids and Acid Derivatives
  • Chemical Bonding and Molecular Structures
  • Chemical Energetics
  • Chemical Equilibria
  • Chemical Kinetics
  • Chemical Reactions And Equations
  • Chemical Reactions and Their Mechanisms
  • Chemistry in Everyday Life
  • Chemistry of p-Block elements
  • Chemistry of Transition and Inner Transition
  • Classification of Elements
  • Coordination Compounds
  • Cyanide, Isocyanide, Nitro compounds and Amines
  • Electrochemistry
  • Electrolysis
  • Elements, Compounds and Mixtures
  • Environmental Chemistry
  • Equilibrium
  • Ethers and Carbonyl compounds
  • Haloalkanes and Haloarenes
  • Hydrocarbons
  • Hydrogen
  • Ideal solutions
  • Introduction to Organic Chemistry
  • Ionic equilibria
  • Matter
  • Matter Around Us
  • Matter In Our Surroundings
  • Metallurgy
  • Metals And Non-Metals
  • Mole Concept and Stoichiometry
  • Natural Resources
  • Organic Chemistry – Basic Principles
  • Periodic Classification of Elements
  • Physical and Chemical Changes
  • Physical and Chemical Properties of Water
  • Polymers
  • Preparation, Properties and Uses of Compounds
  • Principles and Processes of Isolation of Elements
  • Redox Reactions
  • Relative Molecular Mass and Mole
  • States of Matter
  • Structure Of The Atom
  • Study of Compounds
  • Study of Gas Laws
  • Study of Representative Elements
  • Surface Chemistry
  • The d-block and f-block elements
  • The Gaseous State
  • The p-Block Elements
  • The Periodic Table
  • The s-Block Elements
  • The Solid State
  • Thermodynamics

High School Biology

  • Absorption and Movement of Water in Plants
  • Adolescent Issues
  • Anatomy of Flowering Plants
  • Animal Kingdom
  • Bacteria and Fungi-Friends and Foe
  • Biodiversity and Conservation
  • Biofertilizers
  • Biological Classification
  • Biomedical Engineering
  • Biomolecules
  • Biotechnology and its Applications
  • Biotic Community
  • Body Fluids and Circulation
  • Breathing and Exchange of Gases
  • Cell – Unit of Life
  • Cell Cycle and Cell Division
  • Cell Division and Structure of Chromosomes
  • Cell Reproduction
  • Cellular Respiration
  • Chemical Coordination and Integration
  • Circulation
  • Control And Coordination
  • Crop Improvement
  • Digestion and Absorption
  • Diversity In Living Organisms
  • Ecosystem
  • Environmental Issues
  • Excretory Products and their Elimination
  • Flowering Plants
  • Genes and Chromosomes
  • Health and Diseases
  • Health and Its Significance
  • Heredity And Evolution
  • Heredity and Variation
  • How Do Organisms Reproduce?
  • Human Diseases
  • Human Eye And Colourful World
  • Human Health and Disease
  • Human Population
  • Human Reproduction
  • Hygiene
  • Improvement In Food Resources
  • Integumentary System- Skin
  • Kingdom Fungi
  • Kingdom Monera
  • Kingdom Protista
  • Life Processes
  • Locomotion and Movement
  • Microbes in Human Welfare
  • Mineral Nutrition
  • Molecular Basis of Inheritance
  • Morphology of Flowering Plants
  • Neural Control And Coordination
  • Nutrition in Human Beings
  • Organism and Population
  • Photosynthesis
  • Photosynthesis in Higher Plants
  • Plant Growth and Development
  • Plant Kingdom
  • Pollination and Fertilization
  • Pollution; Sources and its effects
  • Principles of Inheritance and Variation
  • Reproduction and Development in Angiosperms
  • Reproduction in Organisms
  • Reproductive Health
  • Respiration in Human Beings
  • Respiration in Plants
  • Respiratory System
  • Sexual Reproduction in Flowering Plants
  • Strategies for Enhancement in Food Production
  • Structural Organisation in Animals
  • Structural Organisation of the Cell
  • The Endocrine System
  • The Fundamental Unit Of Life
  • The Living World
  • The Nervous System and Sense Organs
  • Tissues
  • Transpiration
  • Transport in Plants

High School Math

  • Algebra – Arithmatic Progressions
  • Algebra – Complex Numbers and Quadratic Equations
  • Algebra – Linear Inequalities
  • Algebra – Pair of Linear Equations in Two Variables
  • Algebra – Polynomials
  • Algebra – Principle of Mathematical Induction
  • Algebra – Quadratic Equations
  • Binomial Theorem
  • Calculus – Applications of Derivatives
  • Calculus – Applications of the Integrals
  • Calculus – Continuity and Differentiability
  • Calculus – Differential Equations
  • Calculus – Integrals
  • Geometry – Area
  • Geometry – Circles
  • Geometry – Conic Sections
  • Geometry – Constructions
  • Geometry – Introduction to Euclid’s Geometry
  • Geometry – Three-dimensional Geometry
  • Geometry – Lines and Angles
  • Geometry – Quadrilaterals
  • Geometry – Straight Lines
  • Geometry – Triangles
  • Linear Programming
  • Matrices and Determinants
  • Mensuration – Areas
  • Mensuration – Surface Areas and Volumes
  • Number Systems
  • Number Systems – Real Numbers
  • Permutations and Combinations
  • Probability
  • Sequence and Series
  • Sets and Functions
  • Statistics 
  • Trignometry – Height and Distance
  • Trignometry – Identities
  • Trignometry – Introduction

Middle School Science

  • Acids, Bases And Salts
  • Air and Its Constituents
  • Basic Biology
  • Body Movements
  • Carbon and Its Compounds
  • Cell – Structure And Functions
  • Changes Around Us
  • Chemical Effects Of Electric Current
  • Chemistry in Your Life
  • Coal And Petroleum
  • Combustion And Flame
  • Components Of Food
  • Conservation Of Plants And Animals
  • Crop Production And Management
  • Electric Current And Its Effects
  • Electricity And Circuits
  • Elements and Compounds
  • Fibre To Fabric
  • Food production and management
  • Force And Pressure
  • Forests: Our Lifeline
  • Friction
  • Fun With Magnets
  • Garbage In, Garbage Out
  • Getting To Know Plants
  • Health and Hygiene
  • Heat
  • Hydrogen
  • Life Processes: Nutrition in Animals and Plants
  • Light, Shadows And Reflections
  • Materials: Metals And Non-Metals
  • Matter and Its States
  • Metals and Non-metals
  • Micro Organisms: Friend And Foe
  • Motion And Measurement Of Distances
  • Motion And Time
  • Nutrition In Animals
  • Nutrition In Plants
  • Organization in Living Things
  • Our Environment
  • Physical And Chemical Changes
  • Pollution and conservation
  • Pollution Of Air And Water
  • Reaching The Age Of Adolescence
  • Reproduction In Animals
  • Reproduction In Plants
  • Respiration In Organisms
  • Rocks and Minerals
  • Separation Of Substances
  • Simple Machines
  • Soil
  • Some Natural Phenomena
  • Sorting Materials Into Groups
  • Sound
  • Stars And The Solar System
  • Structure of Atom
  • Synthetic Fibers And Plastics
  • The Living Organisms And Their Surroundings
  • Transfer of Heat
  • Transformation of Substances
  • Transportation In Animals And Plants
  • Universe
  • Waste-water Story
  • Water: A Precious Resource
  • Weather, Climate And Adaptations Of Animals To Climate
  • Winds, Storms And Cyclones

Middle School Math

  • Addition
  • Area and Its Boundary
  • Boxes and Sketches
  • Data Handling
  • Fun With Numbers
  • Heavy and Light
  • How Many
  • Long And Short
  • Mapping
  • Measurement
  • Money
  • Multiplication and Factors
  • Multiply and Divide
  • Numbers
  • Parts and Wholes
  • Pattern Recognition
  • Patterns
  • Play With Patterns
  • Rupees And Paise
  • Shapes And Angles
  • Shapes And Designs
  • Shapes and Space
  • Similarity
  • Smart Charts
  • Squares
  • Subtraction
  • Tables And Shares
  • Tenths and Hundredths
  • Time
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