Class 7 Chapter 18 Wastewater Story
Introduction We use water for our daily activities and make it dirty. Wastewater is the dirty water that goes down the drains from sinks, toilets, and laundries which is rich in lather, and mixed with oils. We can reuse this dirty water by removing pollutants from it. Demand for water is increasing day by day …
Class 7 Chapter 15 Light
Introduction We see a beam of sunlight, a beam of the headlight, a beam of light from the torch. A beam of light from LED. Because of the light, we are able to see things around us.
Class 7 Chapter 17 – Forest
Introduction Forest gives us oxygen on a large scale. Forest purifies the air and water as it plays an important role to balance the water table. Forests and trees recharge the groundwater by absorbing the rainwater and groundwater. Cutting down trees and forests for our needs leads to a great disturbance in nature as it …
Class 7 Chapter 16 Water: a Precious Resource
Introduction If you have water, you can think of the future. World water day is celebrated on 22nd March. Water is a very precious natural resource. On average 50L water is used per person for their daily activities like drinking, bathing, washing clothes and maintaining proper hygiene. The demand for water is increasing day by …
Class 7 Chapter 14 Electric Current and its effects
Introduction We often play a game called “how steady is your hand?” in this game we make an arrangement by using various electric components like electric cells, electric wires, metallic objects, electric bulbs and switches. In this game, if the electric bulb glows up then we lose the game. We all know that the light …
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Class 7 Chapter 13 Motion and Time
Introduction An object can move in three types of motion straight-line motion, circular motion or periodic motion. Some objects move fast while some object fast.
Class 7 Chapter 12 Reproduction in Plants
Introduction Reproduction is the production of new individuals from their parents. All living organism reproduce their young ones. In plants, there are different modes of reproduction.
Class 7 Chapter 11 Transportation in Animals and Plants
Introduction All organisms need a continuous supply of food, water and oxygen for survival. They need to transport all these to various parts of their body. Also, animals need to transport wastes to parts from where they can be removed. I human beings’ the organs of the circulatory system are the heart, blood and blood …
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