1. Composition: This is about what the matter is made of. It's the building blocks, the elements and compounds that make up the substance.
* Elements: The simplest form of matter, made up of only one type of atom (like gold, oxygen, or carbon).
* Compounds: Two or more elements chemically combined in a fixed ratio (like water, salt, or carbon dioxide).
* Mixtures: Two or more substances physically combined but not chemically bonded (like sand and water, or salt and pepper).
2. Properties: This describes how the matter behaves.
* Physical properties: Characteristics that can be observed without changing the substance's chemical composition (like color, density, melting point).
* Chemical properties: How a substance reacts with other substances, leading to a change in composition (like flammability, reactivity with acid).
So, to answer your question: Yes, composition is a key factor in classifying matter, but it's not the only one. Scientists use both composition and properties to create a comprehensive classification system.
