Tag Archives: Science Class 10

CBSE Science Class 10 | Pollution of River Ganga

The Pollution of River Ganga (and other rivers and water bodies in India) is an important topic that is discussed and studied in CBSE Science Class 10.   Water, air, soil and flora and fauna have been revered by ancient spiritual people.  Unfortunately, the holy River Ganga is the sixth most polluted river at present.  The River Ganga runs a course of 2500 km from Gangotri in the Himalayas to Ganga Sagar in the Bay of Bengal.   The River Ganga supports nearly 40% of India’s inhabitants across 11 states. Hundreds of cities and towns in Uttar Pradesh, Bihar, West Bengal as well as other states have added untreated sewage, industrial waste and garbage to River Ganga.  Ironically, festivals and immersion of ashes as well as unburned corpses are also contributing to the pollution.  Awareness regarding maintaining cleanliness of River Ganga and … Continue reading

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CBSE Online Course | The Importance of Rainwater Harvesting

The CBSE Science Course for class 10 students includes topics like rainwater harvesting.  Topics like rainwater harvesting studied in the science course help students understand the need for sustainable solutions to environmental challenges.  The following is a short overview which drives home the importance of rainwater harvesting. Importance of Rainwater Harvesting Rainwater harvesting is a wise solution to the growing needs for clean water.  Did you know that 71% of the earth’s surface consists of water?  Ironically, the majority of water in the earth’s surface is salt water.  Only 2.5% of surface water available is fresh water. Precipitation or rainfall is one of the major components of the water cycle.  The rain that falls on land and freshwater bodies contributes to the availability of drinking water.  Water is most essential for the survival and well-being of human beings.  With water … Continue reading

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CBSE Online Course | Science Class 10 | Effects of Oxidation: Corrosion and Rancidity

The CBSE science course encourages students to develop a keen interest in science.  Theory classes are now being taught in a more interactive manner to encourage the 21 century skill of scientific inquiry.  The CBSE science course encourages inquiry-based learning along with practical and application-based learning.  In chemistry, one of the concepts covered is effects of oxidation: corrosion and rancidity. Write down what you know about oxidation: corrosion and rancidity.  Have you heard of these phenomena?  What are you wondering about this?  Now, let us briefly go through this topic. Effects of Oxidation: Corrosion and Rancidity Corrosion: Corrosion is an example of a chemical reaction that a metal undergoes with the environment.   Corrosion is defined as the gradual destruction of a metal due to chemical reaction taking place with environmental constituents.  Can you think of one example of corrosion that … Continue reading

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CBSE Online Course | Science Class 10 | Three Types of Chemical Reactions with Examples

Types of chemical reactions with examples is a chemistry topic which is studied by CBSE science class 10 students.  The world is filled with an intriguing variety of substances.  Planet earth has witnessed simple and complex types of chemical reactions from time immemorial.  A short overview of types of chemical reactions with examples is given below: Three Types of Chemical Reactions with Examples A chemical reaction is a process by which chemical substances known as reactants react with each other to form new chemical substances known as products.  During a chemical reaction, breaking of bonds and forming of bonds between atoms of chemical substances take place resulting in the formation of new substances. Combination reaction: A combination reaction as the name itself suggests is a reaction in which two or more substances, either elements or compounds, combine to form a … Continue reading

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CBSE Online Course | Science (Physics) Class 10 | Solar Water Heater and Solar Cells

Solar water heater and solar cells are studied in the chapter “Sources of Energy” by CBSE Science Class 10 students.   You must have seen solar panels or solar water heaters in the terraces of a few buildings.  Solar water heaters are being used increasingly around the world and are a greener and cleaner option.  The initial costs may be higher, but in the long term, having a solar water heater is not only eco-friendlier but also a more economically viable option.   Solar water heaters and solar cells are still in the early stages of research and development.  With greater innovations in solar technology, we will increasingly find more and more homes, offices, etc., powered by solar energy in the future.  The following is a short overview of solar water heater and solar cell: Solar Water Heater and Solar Panels/Solar Cells … Continue reading

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CBSE Online Course | Science Class 10 | Solar Energy – Make a Simple Solar Cooker this Summer

Solar energy is an important topic which is studied in the chapter Sources of Energy by class 10 CBSE students in Science (Physics). Solar energy is a clean and renewable form of energy.  It is also non-polluting and abundantly available.  It is one of the sources of energy which we will chiefly depend upon in the future.  Unlike coal and petroleum which are non-renewable and have already created havoc in our fragile planet, solar energy offers a greener, cleaner and sustainable alternative.  The harnessing of solar energy for our energy needs and as a source of energy is still in its early stages of research and development.   Countries like India are blessed with abundant amount of energy from the sun for most of the year.  Applications of solar energy will be a great boon to humanity and the environment all … Continue reading

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