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Let us look at the consolidated Class 6 Science notes given below. All the sections cover the gist of the primary areas of study in the subject, relevant for Class 6.

Food: Where does it come from

  • Food is the fuel for the body
  • We need food as it helps our body to grow, to remain healthy and for energy
  • Two primary sources of food – plants and animals
  • All the parts of the plants such as stems, leaves, roots, seeds, and fruits can be consumed
  • Animals are the source of many food materials such as eggs, meat, milk, and fish
  • Vegetarians are those human beings who depend on plants and its products for their food
  • Non-vegetarians are those human beings who depend on animals and their products for food

Components of Food

  • We eat various meals on a day that consists of a variety of food
  • Food helps curb hunger as well as provide us with nourishment and energy
  • You need food for a healthy heart, for an active brain and for working muscles and strong bones
  • Nutrients are – Carbohydrates, Proteins, Fats, Vitamins, and Minerals

Synthetic Fibres and Natural Fibres

  • Thread-like structures that are long and flexible and thin too are known as fibres
  • They can be natural and synthetic fibres
  • Natural fibres are those that are obtained from plants or mineral or animal source
  • Animal Fibres are wool and silk
  • Plant fibres are jute and cotton
  • Synthetic fibres are man-made polymers. They are joined chemically
  • Rayon and nylon are synthetic fibres

Sorting Material into Groups

  • Substances that are same but have different textures, shapes and sizes are required for different purposes
  • We need to sort materials into groups as per their usage.
  • The advantages of sorting are that one can identify the proper method of disposal. Whether the material is biodegradable or non-biodegradable
  • The method of storage of that substance can be determined
  • It helps in manufacturing and identifying the nature of the material
  • One can make proper usage of the substance                                                           

Separation of substances

  • Substances are not always present in their purest forms. They are usually available as mixtures
  • One needs to separate the unwanted substance and get the useful component out of it
  • Common ways to separate are
    • Handpicking
    • Threshing
    • Winnowing
    • Sieving

Changes around us

  • Changes are phenomena that transform an object into something else
  • We see different objects around us change their form. Sometimes the original form can be obtained back and at times you cannot get it back
  • Some changes are slow and some are accelerated. Change in color, the growth of a plant are all changes
  • Melting, boiling, evaporation etc are reversible changes. A +B ⇌ C + D
  • Irreversible changes mean where the original form cannot be gotten back. Such as burning a paper or boiling an egg. A → B +C

The Human Body

  • The human anatomy of the skeletal system allows us to do all sorts of functions
  • A system of bones which is known as the skeletal system is what comprises us from within
  • This system of bones frame the shape and support our body
  • There are 206 bones in the adult body
  • Where the bones meet it is known as joints
  • There are two kinds of joints, moveable and fixed
  • The skeletal system starts from the skull, down to the ribcage, backbone and then the limbs
  • Bones are also the shield to the internal organs

Living organism and their surroundings

  • Living organisms live in different conditions, climatic and otherwise
  • The organisms are best suited to their surrounding known as habitat
  • Different habitats such as terrestrial which includes desert, mountains, and grasslands
  • Aquatic habitats such as ponds, oceans
  • Living organisms have common characteristics such as the need for food, respiration, reproduction, and growth

Measurement of distance

  • When you compare an unknown quantity with a known fixed constant it is called measurement
  • It consists of units and numbers
  • There is the conventional system of measurements where the method predicts approximately the measure of an object. It varies from person to person
  • The standardized system of measurement which doesn’t vary from person to person
  • There are different types of motion – rectilinear, circular, periodic

Light, shadows and reflection

  • Light makes things visible to us
  • Some objects are luminous and others are non-luminous
  • Objects can be categorized as transparent, translucent and opaque
  • Shadow forms when an opaque object blocks light
  • Eclipse is a natural phenomenon

Electric Circuit

  • A closed loop or path that forms a network of electrical components and electrons are able to flow.
  • Electrical wires act as a battery in such a path.
  • Below are symbols used in electrical circuits.

Image Credits: Byjus

  • A simple circuit has a power source, conductor, switch and a load

Fun with magnets

  • When two bodies that have charges which are in the same direction of motion and develop an attraction or when similar charges repel it is magnetism
  • Conduct a simple experiment to test of this theory


  • Water is essential to life
  • One needs to make efforts to conserve water since it is one of the basic resources

Air around us

  • Air is a mixture of many gases
  • Water vapour, oxygen, nitrogen, carbon dioxide, smoke and dust particles all make up air

Disposal of waste

  • Substances no longer useful to us are known as garbage
  • There is biodegradable waste and non-biodegradable waste
  • Waste comes from domestic, commercial, industrial and agricultural sources
  • One must reduce, reuse and recycle waste
  • Plastic are non-biodegradable

These were the main areas of study in Science for Class 6 students. To go through the Science Notes for Class 9 students, visit here.

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