Sept 28--Matter

Question: What is a matter?

Answer: Anything around us that has mass and takes up space is called matter. :)

Pure Substances have only one set of properties and one kind of particle. 

Elements are pure substances that have the simplest form. They're made of atoms. Three types of elements are: metal, metalloid, and non metal.

Compounds are also pure substances. They are made of chemically combined elements. The smallest particle of a compound is a molecule. There are two types of compounds: ionic and covalent.

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Mixtures have more than one set of properties and substances. Unlike compounds, the substances are physically combined. Homogeneous and heterogeneous are two kinds of mixtures.

Solutions are homogeneous, which are uniform throughout and appear to have only one component.

The mixture of water and oil is one type of heterogeneous. It is not uniform, and appears to have more than one component.

Question: What is the difference between a physical change and a chemical change?

Physical Change	Chemical Change
- no new substance is formed	- new substances are formed
- chemical composition does not change
- reversible	- irreversible

Question: Are there any other properties of matter?

- Matter is neither created nor destroyed. It can only change from one form to another.

- There are three states: solid, liquid, and gas.

Solid	Liquid	Gas
- does not change shape easily	- takes the shape of the container	- takes the shape of the container
- won’t change too much in volume when heated	- changes slightly in volume when heated	- changes drastically in volume when heated