Every substance in the world is either a solid, a liquid or a gas. Some substance can exist in all the three states. Note: A solid has a definite size and shape; a liquid has a definite size but not shape; and a gas or vapour has no definite size and shape. You must have come across the changes of the states of matter (melting, freezing, evaporation, condensation, sublimation and deposition) which we discussed extensively in our book 1. Let’s now consider the three states of matter <div class="sign-up-notice-after-excerpt-two" style="background-color:powderblue;"> You are viewing an excerpt of this lesson. Subscribing to the subject will give you access to the following: <ul> <li>The complete lesson note and evaluation questions for this topic</li> <li>The complete lessons for the subject and class (First Term, Second Term & Third Term)</li> <li>Media-rich, interactive and gamified content</li> <li>End-of-lesson objective questions with detailed explanations to force mastery of content</li> <li>Simulated termly preparatory exams</li> <li>Discussion boards on all lessons and subjects</li> <li>Guaranteed learning</li> <li>Win great prizes for topping the <a href="https://www.primacyebooks.com">Primacy Ebooks</a></li> </ul> </div> <div class="sensei-message info"></div>