Class 8

Important points to remember : The world around us  is made up of living and non living factors.  Living are called biotic  factors while non…

Important points to remember : Structure  of all  the  plastics is not  same. Some are linear while some are circular.  Depending upon the effect  of…

Important points to remember : The sense of vision is the most important among our five senses. Because  of this we can see the hills, …

Question 1:Fill in the blanks with approriate word: a. The region in a sound wave,  with higher pressure and density is called……………. and that with…

Important points to remember : A huge amount of heat is produced in a very short time when the nuclei of some elements like uranium,…

Important points to remember : During a chemical change the chemical composition of the original matter changes and new substances having different properties and different…

Important points to remember : Acids are soluble in water and they are corrosive in nature. Animals and plants also possess acids in them. Acids…

Important points to remember : Group of organs working together to perform a specific function is called as organ system. Various organ systems like digestive,…

Important points to remember : cell is the structural and functional unit of living organisms.  According to the functions, cells of different  sizes and structures…

Important points to remember : Sudden vibrations  on the  earth  and shaking of the  earth  surface  /ground  is called an earthquake.  The machine  / Instrument…

Important points to remember : Contamination  of  natural  environment  that  will  be  harmful  to  ecosystems  is  called as pollution.  Many problems have been arisen on…

Important points to remember : Gold, silver,  iron,  copper, aluminium,  magnesium,  calcium,  sodium, platinum  are a few metals.  Metals are good conductors of heat and…

Important points to remember :  Matter  is classified into three types  ‘element’, ‘compound’ and ‘mixture’  by considering whether the smallest  particles  of matter  are similar …

Important points to remember : The concept of atom is more than 2500 years old. However, it was forgotten in the course of time.   In…

Important points to remember : This electric  level  deciding the direction  of flow of electric  charges is called electrostatic potential.  Potential difference  :  Similar to…

Important points to remember : a force is applied between two objects even if the two objects are not in contact,  such a force  is…

Important points to remember : Health  is a state  of complete  physical,  mental and  social  well-beingness  and  not  merely  the absence of any disease.  Condition…

Important points to remember : The process of dividing  living  organism into groups and subgroups is called  Biological classification.  Carl Linnaeus in 1735 divided living…