Lesson 2 Introduction
A pure substance is made up of tiny particles that are ALL the same. Because these particles are sometimes too small to see, knowing if something is a pure substance or a mixture can be difficult. When you combine two or more pure substances, you produce a mixture.
You have already made several mixtures by adding water to various substances. Of course, you can make mixtures by combining any substances not just water.
You can combine solids, liquids, or gases to make various types of mixtures.
You may be able to see all the parts in some mixtures such as when you mix sand with water.
Some these mixtures may not look like mixtures at all. When you add sugar to tea, the sugar dissolves and you see only one part of the mixture – the tea.
You will get some practice making mixtures and identifying them. These mixtures are identified based on how they look and whether they are made from solids, liquids, or gases.
