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Other Chapters For 7th

  • 7th-class Civics Chapter 10

    According to the Indian Constitution all Indians are equal in terms of law and that no one can...
  • 7th-class Civics Chapter 5

    A shirt that is available for sale in the market has a long 'journey'- right from the production...
  • 7th-class Civics Chapter 8

    *Markets are one of the busiest places in a society. There are various three types of markets,...
  • 7th-class Civics Chapter 7

    Advertising is an integral part of marketing. Because of the cut-throat competition in the...
  • 7th-class Civics Chapter 4

    *A medium is a means or way of communication, and modern mass media is everything that is used...
  • 7th-class Civics Chapter 3

    One of the factors which shape the identity of an individual is his or her gender. Girls are...
  • 7th-class Civics Chapter 2

     An MLA is a Member of a Legislative Assembly. He is a representative elected by the voters...
  • 7th-class Civics Chapter 1

    The Indian Constitution recognizes every person as equal. It means that every individual in the...
  • 7th-class History Chapter 10

    The Mughal Empire started facing a lot of crises towards the end of the 17th century. The...
  • 7th-class History Chapter 9

    We know about people from the place they live in, the food they eat, the...

7th Class Chapter No 18 - Waste water Story in Science for CBSE NCERT

The water which gets contaminated after various works; like washing, bathing, mopping, etc. is called wastewater. International Decade for Action on Water for Life (2005 – 2015): It was declared by the General Assembly of the United Nations. Its main goal was to reduce the number of people who do not have access to safe drinking water; by half. Sewage Treatment: The process of removing impurities from waste water before it can be reused or sent to the water bodies is called sewage treatment or cleaning of water. Sewage: The liquid waste which has water as its largest component; along with various types of impurities; is called sewage.
Posted in 7th on February 13 2019 at 03:29 PM

CBSE NCERT 7th CLASS Science OTHER CHAPTERS

  • 7th-class Science Chapter 17

    Forest: An area with high density of trees is called a forest. A forest is a system which is...
  • 7th-class Science Chapter 16

    About 71% of the earth's surface is filled with water. But out of this, a very small amount is...
  • 7th-class Science Chapter 15

    When the mirror is a part of a sphere, it is called spherical mirror. Spherical mirrors are of...
  • 7th-class Science Chapter 14

    Electric Fuse: Electric fuse is a safety device which is used in household wirings and in many...
  • 7th-class Science Chapter 13

    When an object changes its position with elapse of time in respect to a stationary object, such...
  • 7th-class Science Chapter 12

    The process by which a living being produces its offspring is called reproduction. Asexual...
  • 7th-class Science Chapter 11

    Transportation in Unicellular Organisms: In unicellular organisms, transportation of substances...
  • 7th-class Science Chapter 10

    The biological process in which food is utilized to produce energy is called respiration....
  • 7th-class Science Chapter 9

    Percolation rate of water in soil Percolation is the property of absorption of water by...
  • 7th-class Science Chapter 8

    Wind: Moving air is called wind. Air exerts pressure: The fact that Air exerts pressure can be...

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