Prasanna

Chemical Change and Chemical Bond Class 8 Science Notes Maharashtra State Board Ripening of mango, melting of ice, boiling of water, dissolution of salt in water, Ripening of banana, fragrance on ripening fruit, darkening of cut potato, bursting of an inflated balloon, sound of bursting fire cracker, foul smell from spoiled food. During any chemical … Read more

Introduction to Acid and Base Class 8 Science Notes Maharashtra State Board Acid You will notice that some substances have a sweet taste, some are bitter, and some are sour or astringent. Lemon, tamarind, vinegar, or amla-like substances acquire sour taste due to the presence of a typical compound in them. Such compounds imparting a … Read more

Human Body and Organ System Class 8 Science Notes Maharashtra State Board In the last class, we studied some characteristics of living organisms. All the vital processes which are essential properties of living beings, are collectively called life processes. Different organs in our body work in groups to smoothly carry out various life processes. These … Read more

Cell and Cell Organelles Class 8 Science Notes Maharashtra State Board Structure of the Cell According to the functions, cells of different sizes and structures are found in different organs. Components of a Cell 1. Cell Wall: It is found around the cells of algae, fungi, and plants. Animal cells lack cell walls. The cell … Read more

Disaster Management Class 8 Science Notes Maharashtra State Board Earthquake Sudden vibrations on the earth and shaking of the earth’s surface /ground is called an earthquake. These cause seismic waves leading to movements of the earth’s surface like tremors, shaking, or going down. The shocks and waves formed in the interior of the earth spread … Read more

Pollution Class 8 Science Notes Maharashtra State Board Many problems have arisen on the earth due to human interference in nature. Industrialization, increasing population, mining, transportation, and indiscriminate use of pesticides and fertilizers are causing pollution on the earth. It is affecting human beings. Pollution: Contamination of the natural environment that will be harmful to … Read more

Metals and Nonmetals Class 8 Science Notes Maharashtra State Board All the objects or materials in the world are made from elements, compounds, or their mixtures. Scientists classified all the elements into three general types which are metals, nonmetals, and metalloids. Metals Gold, silver, iron, copper, aluminium, magnesium, calcium, sodium, and platinum are a few … Read more

Composition of Matter Class 8 Science Notes Maharashtra State Board We saw in the previous standards that all the objects that we see around us and also those that cannot be seen are made of the same or other matter. Take some mustard seeds in a transparent plastic jar. Thread a long thread at the … Read more

Inside the Atom Class 8 Science Notes Maharashtra State Board We have seen that matter is made of molecules. Molecules are formed from atoms. Effectively an atom is the smallest unit of matter. An atom is the smallest particle of an element which retains its chemical identity in all physical and chemical changes. We have … Read more

Current Electricity and Magnetism Class 8 Science Notes Maharashtra State Board An atom has the same number of positively charged protons and negatively charged electrons. So an object doesn’t show any charge though its atoms contain charged particles. Therefore, we can say that plenty of electrical charge is filled in the objects around us. What … Read more