physical features ( social science)

Aschelminthes or nemathelmenthes includes round or thread worm...

What do all Acids and all Bases have in Common? - From the previous activities one observes that all acids generate hydrogen gas on reacting with metals. Hydrogen seems to be common to all acids. In fact all acids contain hydrogen ions (H + ). A base is a substance, which on dissolving in water yie..

A physical change is one in which the shape, size, appearance or state, of a substance may alter, but its chemical composition remains sam..

A physical change is one in which the shape, size, appearance or state, of a substance may alter, but its chemical composition remains same. No new substance is formed. It is usually a change, which is reversible. By reversing the process, the original substance can be obtained. Example,..

Properties of objects and materials Position and motion of objects Light, heat, electricity, and magnetis..

Properties and changes of properties in matter Motions and forces Transfer of energ..

Properties and changes of properties in matter Motions and forces Transfer of energ..