Introduction All living organisms respire to extract energy from food. Living organisms are composed of cells which are responsible to perform some functions like nutrition, excretion, reproduction and transport. Cells need energy derived from food to perform these functions. https://www.youtube.com/watch?v=mzk3gQ-qS7s&t=193s
Soil The uppermost layer of the earth’s crust where plants grow is called soil. Soil is a very important natural resource. Soil gives anchorage to plants and provides water and nutrients. It is essential for agriculture and is home to many organisms. Agriculture is the source of food, clothing and shelter. https://www.youtube.com/watch?v=F47oRR6QM5w&t=1s …
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Introduction The day-to-day condition of the atmosphere at a place with respect to the temperature, humidity, rainfall, wind speed, etc., is called the weather at that place and time. The daily weather report available in newspapers and on news channels carries information about the temperature, humidity and rainfall during the past 24 hours. It also …
Class 7 Chapter 7 Weather, Climate and adaptations of animals to climate Read More »
Introduction We notice many changes taking place around us on their own. For instance, flowers bloom and wither with time, and crop changes from time to time. Changes take place in our body also like an increase in height and weight etc. When one or more properties of a substance become different or something new …
Introduction As we know that curd, lemon juice, orange juice and vinegar taste sour. These substances taste sour because they contain acids. These substances are acidic in nature. The word acid comes from the Latin word acere which means sour. Substances which are bitter in taste and soapy to touch are called bases. These substances …
Introduction We wear woollen clothes during winter because they keep us warm. We usually prefer to wear light-coloured cotton clothes in summer. These give us a feeling of coolness. In winter you feel cold inside the house. If you move out in the sun, you feel warm. In summer, you feel hot even inside the …
Introduction We already know that fibres are obtained either from animal sources or plant sources and are called natural fibres. For example: cotton and jute are obtained from plants. Silk and wool are obtained from animals.
Introduction Nutrition in animals include nutrient requirements, mode of intake of food and its utilization in the body. Digestion: It is the process by which animals break down complex food substances into simpler substances. Different ways of taking food.
Introduction The manner of taking food by an organism and its utilisation by the body is known as Nutrition. Carbohydrates, proteins, fats, vitamins and minerals are components of food and are called nutrients. https://youtu.be/OKjAppZv0VI
