INTRODUCTION TO MATTER

WHAT IS MATTER?

VOLUME

MASS

Remember: Your mass never changes no matter where you are in the universe; your weight does change due to gravity!

INERTIA

PHYSICAL & CHEMICAL PROPERTIES

Physical property- a property that can be observed, or measured without changing the matter's identity

Ex. shape, state of matter

DENSITY

Physical changes- a change that affects one, or more physical properties of a substance.

Ex. ice melting

CHEMICAL PROPERTIES

EXAMPLES OF CHEMICAL PROPERTIES:

• Flammability
• Reactivity with oxygen

CHARACTERISTIC PROPERTIES

You can observe physical properties without changing its identity
-Ex. you can find the density and hardness of an object without changing anything about the object

Chemical properties aren't as easy to observe
-Ex. you can only observe an object's flammability when it's burning

Chemical change- happens when one, or more substances changes into a new substance with new & different properties
-Ex. milk souring, baking a cake

CHEMICAL CHANGES CHANGE THE IDENTITY OF THE MATTER INVOLVED

Composition- of an object is the type of matter that makes up the object & the way that the matter is arranged

PHYSICAL CHANGES DO NOT CHANGE THE

CHEMICAL CHANGES DO ALTER

CAN PHYSICAL & CHEMICAL CHANGES BE REVERSED?

• Physical changes can easily be reversed.
• Chemical changes cannot be easily reversed.