Science > Chemistry > Chemical Equilibrium > Types of Chemical Reactions In this article, we shall discuss only those types of chemical reactions which are linked to the topic of chemical equilibrium. Chemical Reaction: In a chemical reaction one or more substances, called reactants undergo a chemical change to produce new substances called products of […]
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Heat Transfer by Conduction
Science > Physics > Heat Transfer > Conduction Heat always gets transferred from the body and higher temperature to a body at lower temperature heat transfer can take place in three ways a) Conduction b) Convection and c) Radiation. In this article, we shall study the heat transfer by the conduction. Conduction: If one end […]
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Cathode Rays
Science > Physics > Cathode Rays and X- Rays > Cathode Rays In 1859, Julius Plucker started the study of the conduction of electricity through gases at low pressure in the discharge tube. William Crooke, J. Perrin, J. J. Thomson did a further investigation in this field. In 1885, Sir William Crookes carried out several […]
Science > Physics > Cathode Rays and X- Rays > X-Rays Discovery of X- Rays: If a discharge tube is highly evacuated so that the pressure in the tube is of the order of 0.01 mm of mercury, certain rays are emitted by the cathode in the form of bluish streamers. These rays are called […]
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Modes of Heat Transfer
Science > Physics > Heat Transfer > Convection and Radiation In this article, we shall study different modes of heat transfer. Convection: Convection is a mode of heat transfer through a material medium in which heat energy is carried from one place to another by actual motion “migration” of heated matter. Consider a beaker containing […]
Some liquids like water Kerosene flow very easily while some liquids like honey, glycerine do not flow easily. The property by virtue of which a liquid or a fluid opposes the relative motion between two adjacent layers is called viscosity. The force which opposes the relative motion between two adjacent layers in a fluid is […]
Biology > Microbes in Human Welfare > Biofertilizers and BioControl Agents In this article, we shall study the use of microbes as biocontrol agents and biofertilizers. Microbes as Biocontrol Agents: Chemical insecticides and pesticides are toxic and extremely harmful, to human beings and animals. These chemicals pollute the environment (soil, groundwater), fruits, vegetables, and crop […]
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Division Thallophyta
In this article, we shall study the characteristics and examples of Division Thallophyta. (Greek – Thallus – plant body without root, stem, and leaves; phyton – a plant) Characteristics of Division Thallophyta: Members of division Thallophyta are the most primitive and simple plants. The plant body is not differentiated into root, stem, and leaves. They are […]
In this article, we shall get a general idea of the classification of plants. In the next articles, we shall study the classification of plants in detail. Characteristics of Kingdom Plantae: Kingdom Plantae consists of all plants which are multicellular eukaryotes with cell walls. All plants contain plastids. Plastids are a double-membrane organelle that possesses photosynthetic […]
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Viruses
Science > Biology > Classification of Microbes, Protists, and Fungi > Viruses In the five-kingdom classification of Whittaker, there is no mention of some acellular organisms like viruses and viroids and lichens. Viruses did not find a place in classification since they are not truly ‘living’ if we understand living as those organisms that have […]