Category: Science Class 9

When a liquid remains exposed to air its volume decreases gradually. This is because of an evaporation. During this process, some of the surface liquid

How Does Evaporation Cause Cooling? Evaporation is the method of turning of a substance into vapor or steam, well below its boiling level. Whatever the

Every material present around us has some specific properties due to which we are able to differentiate between various particles. These properties are specifically about

Matter is present everywhere around s and we notice that some of the matter can transform its physical state by going through some of the

In chemistry, scientists link the mass of an element or compound to the number of atoms or molecules present in them. this is done through

Every object that has space and occupies is called matter. Through this definition we can get an idea about how important is mass for the

The chemical formula of simple compound represents the composition of a molecule of the compound in terms of the symbol of these elements present in

Like in our world, the identity of each person is his/her name, similarly, in chemistry, the first identity of each substance is its chemical formulae.

When we observe our surrounding, we find that every object present around us is composed of much smaller units that act as the building blocks

In chemistry we deal with chemical components of substances. Their chemical composition helps us in determining the properties of substances. Also, we need to know

What is diffusion? Diffusion is the process by which molecules from higher concentration move to lower concentration until they are evenly distributed and an equilibrium

What is latent heat? The heat absorbed by any matter without any rise in temperature is called as latent heat. Latent is another word for