When looking for something on a slide you should start on the smallest magnification, that way you can see more of the slide. Once you have the object in focus, you can switch to a higher magnification.
Most elements exist in different states of matter such as liquid, gas and solid. As per Bose classification, there exist five states of matter along with two new states that are - plasma and Bose-Einstein. The main difference between the different states is the densities of the particle. For example – Water occurs in three states namely solid (ice), liquid (water) and gas (water vapor).