Skip to main content

THE MAGIC OF NATURE POEM WRITTEN BY SAFALYA PAL

THE MAGIC OF NATURE THE MAGIC OF NATURE OUR WONDER DOES GROW THE SECRETS OF NATURE ARE NOT FOR THE HUMANS TO KNOW THE MAGIC OF NATURE IS FOR ALL TO SEE IT IS ALL AROUND YOU AND ALL AROUND ME THE BEUTIFUL SCENIC VIEW EVERYTHING SEEMS AWESOME AND NEW LOOKING AT THE AWESOME SIGHT YOU FEEL SO TRANQUIL AND DELIGHT THINK HOW THE LUSH FORESTS ALWAYS REMAIN GREEN THINK WHY THE WATER DOESN’T ACCOMPLISH THINK HOW THE NORTHERN LIGHTS ESTABLISH THINK FROM WHERE DO WE GET NATURAL THINGS WE GET ALL THESE FROM THE NATURE AND THOSE ARE POSSIBLE FOR NATURE’S MAGIC! THE NATURAL BEAUTY OF NATURE HAS SO MUCH TO SAY, THE BEAUTIFUL CROSSROADS AND LONG WAY, THE NATURE HAS ITS CHARM, KEEP IT SAFE AND DO NOT HARM, THE NATURE WILL KEEP US UNSAFE, IF WE DON'T KEEP IT SAFE!                                          ...
Post a Comment

Changes around Us NCERT NOTES, CLASS 6

Changes around Us
Change

  • Any difference in the size or shape of an object is referred to as a change.
  • Changes are either reversible or irreversible. 
Reversible change

  • Reversible change is a change that can be reversed by one or more methods.
  • Usually, there is a change in the physical properties, shape and size of the material.
  • A new substance is not formed in a reversible change. For eg: folding of paper, elongation of spring etc.

Irreversible change

  • The change which is permanent and cannot be undone by any physical or chemical means is called an irreversible change.
  • Formation of new substance is involved in this change.
  • For example, the burning of a candle is an irreversible change as we cannot get back the candle once burnt.

 Expansion and Contraction

  • When the temperature increases, the particle of a substance expands or becomes loose. When this happens, the material is said to undergo expansion.
  • The amount of expansion or contraction varies in solids, liquids and gases.
  • When the temperature decreases, the particles of substance contracts or becomes tight. When this happens, the material is said to undergo contraction.
  • There are physical changes that take place when a substance or material moves from one state of matter to another.
  • Water is a classic example as it can exist as either solid, liquid or gas.
  • Water at very low temperatures exists as a solid known as ice. On applying heat or increasing the temperature, the ice 'melts' to form water. The physical change when a solid changes to liquid is called melting.
  • If we keep increasing the temperature, the water now starts to boil until it fully becomes water vapour. The physical change when a liquid changes to gas is called evaporation. 
  • To get back the water from water vapour, it is possible by condensation - a physical change where the gas changes to a liquid. This is possible by lowering the temperature.
    Different states of water as
    temperature varies
    •  

    Anomalous expansion of water

    Water on cooling contracts up to 4∘C. On further cooling, up to 0∘C, water expands rather than contracting with decrease in temperature. This means that as the temperature decreases from 4∘C to 0∘C, water expands. This behaviour is called the anomalous expansion of water.
     

    Burning

    • Burning is an irreversible change where a substance burns to produce new material. These new materials are ash and some gases. 
    • For example. paper is burnt to produce ash which is different from paper in terms of appearance and properties.

    Separation

    The separation of the components of a mixture or an impure substance are carried out with the following purposes :

    1. To remove the unuseful or harmful component.
    2. To obtain the useful component.
    3. To remove impurities for getting a pure sample.
Labels:

Comments

Post a Comment

Popular posts from this blog

How do vaccines work?

  How do vaccines work? The immune system These viruses go on to infect other cells. This causes havoc and this is where our immune system comes to our rescue. The immune system has a whole army of microscopic assassins that prevent these viruses from turning our body into a virus manufacturing unit factory. Now the immune system responds in two ways to protect us. One is the innate or non-specific immunity and another is the adaptive or specific immunity. Innate Immunity As the name suggests, this kind of immunity is there from birth and is non-specific which means that it responds to all kinds of pathogens in the same way. Its ultimate job is to kill the pathogen. The need here is to actually get into action very very quickly. In fact, as soon as the pathogens are detected. We can think about this type of immunity as more bran and less brain. The cells of the innate immunity go berserk as soon as they know that there are pathogens around. They are like the mad assassins trying to...
Post a Comment
Read more

ALL ABOUT PINHOLE CAMERA, NCERT NOTES, CLASS 6

  PINHOLE CAMERA The pinhole camera is based on the principle that light travels in a straight line. Construction of a Pinhole Camera- To construct a pinhole camera follow the steps described below - Take a small box like a shoebox. Paint the box entirely in black to light-proof it Appropriately determine the distance between the film of plastic or ground glass and light source and make a circular pinhole on the bottom of the box Make a shutter by cutting a piece of thick black chart paper. Use sturdy duct tape to hold the shutter in place Use a light adhesive to control the shutter flap and light entering the box Make a viewfinder out of cardboard. Pinhole Camera Image Characteristics- A real image is obtained as the image is obtained on the screen. The size of the image obtained is comparatively smaller than the actual object. The image is inverted on the x-axis as well as on the y-axis. The image can be used in the analysis of the rectilinear propagation of the light. Uses of...
Post a Comment
Read more

Introduction to plants

  Introduction to plants Plants are all around us. They help sustain life on earth by creating food and giving out oxygen that we breathe in. Plants Plants are the immovable living organisms all around us. They are the primary food providers. They are mostly green in colour and use sun as the source of energy to make food. Herbs, shrubs and trees Herbs are the smallest plants and do not have woody stem. Shrubs are slightly larger than herbs. Trees are the largest plants and can have large and thick woody stem. Creepers and climbers Creepers and Climbers are types of plants that need support to grow. Algae and mosses Algae and mosses are the most primitive or simple plants. Algae are found mostly floating on water and mosses are seen on surfaces, rocks or bark of trees in humid conditions.
Post a Comment
Read more