During classification of elements scientist considered few properties that differentiate between metals and nonmetals. Here are the physical properties of metals and non metals – Lustre If you rub the surface of metals like iron, copper, aluminium and magnesium by sand paper, then there is change in appearance. Basically, in pure state all metals have […]
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Dispersion of Light
Light when passes through prism split into different color components. This phenomena is called dispersion of light. A prism is a transparent glass having two plane surfaces inclined at an angle. White light beam passing through prism split into seven colors – “violet, indigo blue, green, yellow orange and red”. The band of colors which […]
Law of Inertia
Law of inertia was put forward by Galileo. He conducted various experiments and finally explained the law of inertia. Let us discuss Galileo’s experiments. Motion of Object on Inclined Plane Galileo allowed to move the object down the inclined plane. He observed that during motion the object accelerates. In another case, he allowed to move […]
Laws of Motion: Aristotle’s Fallacy
Qualitative Interpretation Of Motion Qualitative study suggests to find the reason behind the action. E.g. Newton studied the fall of apple, and stated the reason as gravitational pull. This is qualitative study. Aristotle’s Fallacy Aristotle was the first scientist who studied the phenomena and gave his qualitative interpretation. He was a greek thinker in time […]
Biodegradable and Non Biodegradable Substances
Our Environment is made of living and nonliving things. These things always interact with each other making some impact on environment. Depending on the ability to get decomposed, these substances are classified as Biodegradable and Non biodegradable substances. Biodegradable Substances The substances which can be decomposed by microorganisms into their simplest form are called biodegradable […]
Reflex Action in Human Body
Every individual has capability to respond. Sometimes the response is so sudden that happens without our knowledge. Such type of sudden reactions in response to stimulus are called Reflex Actions. e.g. Accidentally, if you touch a hot object or sharp object your hand get pulled back immediately. Voluntary and Involuntary Actions There are two kinds […]
States of Matter
States of matter exist in three states, solid state, liquid state and gaseous state. Solid state of matter Solids have definite shape, size and fixed volume. Particles of solids are held with strong force of attraction, hence, there are less vacant spaces between the particles. This makes solids very less compressible. Moreover, solids are rigid […]
Matter and its properties
Matter is anything which has mass and occupies space. A chair has a specific mass and it also occupies space, therefore, a chair is a matter. Some other examples are glass, chalk stick, bicycle, etc. Matter is made up of extremely small particles which are invisible to naked eye. Classification: Ancient Indian Philosophers believed that […]
Periodic Table and Periodic Trends
During the discovery of elements, atomic mass was treated as the most fundamental property. In 1913 Henry Moseley showed that atomic number is the most fundamental property. Based on which he proposed the Modern Periodic Law “Properties of elements are a periodic function of their atomic number.” The classification of elements considering atomic number as […]
What is Chain Reaction ?
When a heavy nucleus breaks into daughter nuclei thereby releasing energy , the process is called fission . A very important and interesting feature of neutron-induced fission reaction is the chain reaction. Nuclear fission is carried out by bombarding a slow moving neutron in nucleus of heavy element such as U-235 or thorium Th-232. As […]
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