Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure Ionic bonding is possible due to large difference in the electronegativity of two atoms combining with each other. What will happen if both the atom combining chemically have similar electronegativity? This results in the formation of covalent bond. Lewis suggested that atoms having similar electronegativity, […]
Science
The Mole Concept
Class 11 Chemistry Chapter 1 Some Basic Concept of Chemistry | Class 9 Chapter 3 Atoms and Molecules In this article we will talk about very important concept in chemistry “ Mole Concept ” and “Molar Mass”. During any chemical reaction atoms and molecules rearrange themselves to form new compound. However, atoms and molecules are […]
Deforestation: Causes and Effects
Class 8 Science Chapter 7 Conservation of Plants and Animals In this article we will talk about serious issue of deforestation, causes of deforestation and its consequences. Forests are natural resources which provide shelter, food, provides habitat to survive and reproduce for large number of organisms. Deforestation is process of cutting down of trees in […]
What are Synthetic Fibres?
Class 8 Science Chapter 3 Synthetic Fibres and Plastics This article speaks about synthetic fibres, their properties and their types. Let’s first talk about Fibres. A fibre is a fine string made up of some material. However, fibres can be classified into natural fibres and synthetic fibres. Natural fibres are those which are obtained from […]
Disease – Types, Causes and Effects
Class 9 Science Chapter 13 Why do we fall ill? Disease is a state in which, body or organs of body show variation. Such changes are called symptoms. Therefore, symptoms indicates presence of disease. However, it does not show what the disease is. Diseases can be either acute or chronic. Acute diseases Diseases which last […]
What is Acid Rain?
Class 11 Chemistry Chapter 14 Environmental Chemistry | Class 8 Science Chapter 18 Pollution of Air and Water Acid rain is one of the effect of air pollution. Due to harmful chemicals in air, pH of rain water drops below 5.6 making it acidic, thereby, causing acid rain. Here in this article we will talk […]
Thrust
Class 9 Science Chapter 10 Gravitation “Thrust is force acting perpendicular to the surface.” Consider a box kept on table. Box exerts force on table. Therefore, direction of force is perpendicular. Hence, one can say that the box exerts thrust on the surface of table. Effect of thrust It can be demonstrated by very good […]
Constellation of Night Sky
Constellation – CBSE Class 8 Science Chapter 17 Stars and the Solar System Constellation is made of stars that form a recognisable shape. Some of well known constellations are Ursa Major, Orion, Cassiopeia, etc. Ursa Major It is one of the popular constellation seen in night sky during summer. It is also known as Big […]
What is Energy?
Energy – CBSE Class 9 Science Chapter 11 Work and Energy Energy, force and work are related terms. Consider, the pushing of box. When box is pushed, force is applied and energy is transferred to box. This allows box to move i.e. work is done on box. Hence, energy is defined as, “Capacity of doing […]
Our Solar System
Class 8 Science Chapter 17 Stars and the Solar System Our solar system is consist of sun and celestial bodies. Celestial bodies includes planets, comets, asteroids and meteors. All of these revolves around the sun with the help of gravitational force. However, in this article ‘Our Solar System’ we will talk about Structure of Solar […]