6th Grade Science / Lesson 3 - Describe Matter
What will we be learning today?
How Else Can You Describe Matter?
How would you describe the objects around you? You can describe objects by measuring them. You can also mention their properties. Properties are things you can observe with your senses For example, some properties of objects include odor, hardness, color, and shine. Look at the minerals in the photograph, and you will see many different properties. Talc is very soft, while diamond is one of the hardest substances known. All of the minerals have very different colors, and the pyrite is shiny like a mirror
Properties such as color and odor are called physical properties. Physical properties can be observed without changing the identity of the substance. When you describe the color of a rock, the rock is not changing into something else-it stays the same. The density of a substance is another example of a physical property. Rarely do two substances have the same density. Density can be used to tell substances apart. A material's ability to conduct electricity and its reaction to a magnet are also physical properties. For example, copper and iron are good conductors of electricity, while plastics are not. What's more, copper and plastics are not attracted to a magnet, but iron is. Let's Review What We Learned Today!