Prasanna Useful and Harmful Microbes Class 9 Science Notes Maharashtra State Board Useful Micro-Organisms Lactobacilli Smear a drop of fresh buttermilk on a glass slide. Stain it with methylene blue and put a coverslip over it. Observe the smear under the 10X objective of a compound microscope and then with the more powerful 60X objective. Did … Read more
Energy Flow in an Ecosystem Class 9 Science Notes Maharashtra State Board Energy Flow in an Ecosystem We have already learned the classification of living organisms according to the mode of nutrition into producers, consumers, saprotrophs (saprophytes), and decomposers. Consider the various trophic levels of the ecosystem around you as given below. Primary Consumers (Herbivores): … Read more
Classification of Plants Class 9 Science Notes Maharashtra State Board Kingdom Plantae The group of autotrophic living organisms having eukaryotic cells with cell walls is the group of plants. Plants have become autotrophic as they can perform photosynthesis with the help of chlorophyll. Living organisms of kingdom plantae are the main source of food for … Read more
Acids, Bases and Salts Class 9 Science Notes Maharashtra State Board Ionic Compounds: Recapitulation The molecule of an ionic compound has two constituents: cation (positive ion/basic radical) and anion (negative ion /acidic radical). There is a force of attraction between these ions as they are oppositely charged, called the ionic bond. The force of attraction … Read more
Measurement of Matter Class 9 Science Notes Maharashtra State Board Laws of Chemical Combination The composition of a substance changes during a chemical change. The fundamental experiments in this regard were performed by scientists in the 18th and 19th centuries. While doing this, they measured accurately, the substances used and formed. The scientists Dalton, Thomson, … Read more
Current Electricity Class 9 Science Notes Maharashtra State Board Electricity is of utmost importance in the modern world. We depend on it for almost everything in our day-to-day life. To avoid the inconvenience faced due to the failure of the power supply, hospitals, banks, offices, and private institutions make alternative arrangements with the help of … Read more
Work and Energy Class 9 Science Notes Maharashtra State Board Generally, any mental or physical activity is referred to as work. When we walk or run, the energy in our body is used to do the necessary work. We say that a girl who is studying is working or performing work. But that is mental … Read more
Laws of Motion Class 9 Science Notes Maharashtra State Board Displacement and Distance ‘Distance’ is the length of the actual path traveled by an object in motion while going from one point to another, whereas displacement is the minimum distance between the starting and finishing points. Even if the displacement of an object is zero, … Read more
Disaster Management Class 10 Science Notes Maharashtra State Board Disaster Variously dangerous events occur many times in the environment. Those are called disasters. Some of the main natural disasters are floods, wet and dry famines, cyclones, earthquakes, volcanoes, etc. These are ‘all of a sudden’ troubles to mankind. Such events cause sudden changes in the … Read more
Social Health Class 10 Science Notes Maharashtra State Board Social Health Out of the various aspects of social health, we thought about only one in the above-mentioned activity. Social health is the ability of a person to establish relationships with other persons. The ability to change one’s behavior according to changing social conditions is an … Read more