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Chapter 15 – Air Around Us

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


The air around us is invisible. But it is a fact that air is present everywhere around us. Air occupies every void space. It is present in water and soil as well. When air is in motion, it is called wind. The layer of air that surrounds the earth is known as the atmosphere. The air around us is essential for all living beings for respiration and growth.

Is Air Present Everywhere Around Us?

Absolutely! When you look out of your window and see tree leaves moving, it is the air around us. Recall, when on Sunday, your parents do vacuum cleaning. They use suction pumps to collect dust particles. That suction pump uses air. When you travel, and the breeze that you feel is air. But, we can’t see the air around us. It’s transparent & not visible. Let us now explore what is air made up of.

The air around us is a mixture and not a compound. It comprises 21% of oxygen, 78% of nitrogen, & the remaining 1% is a mixture of water vapour, smoke, and dust. Its composition changes at different locations. 

Let’s now understand what air is made up of. This is as follows:

  1. Nitrogen – Required by plants for their growth.
  2. Oxygen – Used in burning and respiration by all living beings.
  3. Carbon Dioxide – This gas is released on burning. Also, when plants and animals consume oxygen for respiration, they produce carbon dioxide in exchange. Green plants also use it for photosynthesis. 
  4. Water vapour – It is formed by water evaporation. The amount of water in the air around us is called humidity. It varies at every place.
  5. Smoke and Dust – Smoke contains some gases. It also has fine dust particles that are harmful. Remember when our parents scold us when we try to breathe from our mouths? They ask us to breathe from our nostrils. Yes, children breathing through our noses filters oxygen from the air around us. Nostrils hold dust particles to avoid entering them into our lungs. If it enters our lungs, it can make us sick.

Plants and animals are interdependent on earth. How? Plants use carbon dioxide for the preparation of their food during photosynthesis. Plants consume more carbon dioxide from the atmosphere than oxygen. Whereas animals require oxygen for respiration that they take from plants. Animals release carbon dioxide due to the exhalation process of respiration. Plants then consume it. This is how oxygen in the atmosphere is replaced by animal and plant consumption.

Air is present in water in the form of dissolved oxygen. All aquatic animals and plants consume oxygen from dissolved air in water. Similarly, fish take oxygen through their fins underwater.

There are empty spaces that are filled with air in the soil. To understand this, do this activity: Pour some water on the soil. You will see a few bubbles come out first. After which water is soaked by soil. These bubbles are the air that fills space in the soil. So, when there is heavy rain, earthworms come out of their holes. Because the air they were consuming earlier filled in soil space is now filled with water, they don’t have air left in the soil for respiration. This is how oxygen becomes available to animals and plants living in water & soils.

Now, you know that the air around us is essential. We must not pollute the air. Air supports burning fire. It is needed for breathing. Plants are heavily dependent on air to make their food. Birds need air for flying, and you also need to fly your kites. Right? Aeroplanes can only fly because of air pressure. 

Air, when in motion, produces wind. Windmill runs by the wind. A windmill is used to generate electricity. It is used to take out water from a tube well. Air is an essential element in the water cycle. The air around us is an extremely useful natural source that we all are highly dependent on to survive.

What is the air around us called?

It is called the atmosphere.

How do you know that there is air around us? 

With a lot of natural phenomena, we can prove that the air around us is present. Example: wind blowing trees. Another example is when a fan is switched on, your book’s pages start moving independently.

Can you give examples of how the air around us can be? 

The windmill starts rotating its shaft when the air moves. Clothes start swaying & when the trees leave, rustle are few examples of air around us.

Is the air around us a compound or a mixture? 

Air is a mixture of several gases.

What are the five components of air?

Oxygen, Carbon Dioxide, Nitrogen, Water Vapour, Smoke & Dust

What are 20 uses of air?

The 20 uses of air are –

It supports the life of all living beings, helps in growth, used in the photosynthesis process by plants, supplies energy, maintains the temperature, helps in flying kites, participates in cloud formation, used in vehicle tyre & balloon pumping, dispersal of seeds, and pollens, respiration by aquatic animals through dissolved air, drying, generating electricity through windmills, water floating device such as life jackets, used in air cushions & beds, provides oxygen to breathe for living organisms, air balloons, musical instruments such as flute, parachutes, aeroplanes & birds flying.

At MSVgo, understand the Air Around Us Class 6 topic with the power of visualisation. When you visualise, you learn better. Get an in-depth understanding of topics Is air present everywhere around us? What is air made up of? How does oxygen become available to animals and plants living in water and soils? How is the oxygen in the atmosphere replaced? With animated video and interesting examples.

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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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