new science teachers

When scientists started exploring matter, they discovered that the smallest particle of an element that maintains its chemical identity through all chemical and physical changes is called and 'atom'. Just how small these atoms are can be made out if you realize that there are about 60,000,000,000,..

Based on the positions in the periodic table, Mendeleev could predict the properties of some undiscovered elements. He left three blanks for elements that were not discovered at that time. He was able to predict the properties of these unknown elements more or less accurately. He named them eka-bo..

Speciation is the evolutionary process by which new biological species arise. A new species will be a group of individuals distinguished from the original one because by nature only interbreeding takes place amongst their own specie..

Question: Classify as physical or chemical change: 1) Tearing of paper 2) Production of biogas 3) Butter going rancid 4) Magnetisation of iron 5) Clotting of blood Answer: 1) Physical - No change in mass. 2) Chemical - New substances with new properties are produced. ..

Asexual reproduction is the production of new individuals by mitotic divisions from a single paren..

Crop production can be improved by breeding new varieties of crops having higher yield. The main aim of plant breeding is to produce new crops superior to the existing ones. By this method new varieties of crops, having higher yield, resistant to pests and disease can ..

When a chemical reaction occurs how are new substances produced? Do atoms of one element transform themselves into atoms of another element? Do atoms withdraw from the mixture or turn up from elsewhere? Neither of these happens; what takes place is the breaking of old bonds between atoms..

When a chemical reaction occurs how are new substances produced? Do atoms of one element transform themselves into atoms of another elemen..

A chemical reaction in which molecules of a substance break down to form simpler molecules of two or more new substances is recognized as a decomposition reactio..

Asexual reproduction is the production of new individuals by mitotic divisions from a single parent. It does not involve the fusion of gametes, also called sex cells. There are many types of asexual reproduction, all producing individuals that are genetically identical to the paren..