Matter- physical substance in general as distinct from mind and spirit in that which occupies space and possesses rest mass especially as distinct from energy.
Here is a little fact for you to know, Matter is made up of what atoms and molecules are made of, meaning anything made of positivley charged protons.
Heterogeneous refers to a structure with dissimilar components or elements and Heterogenous refers to a structure having a foreign origin.
The difference between a solution and a suspension is in the particle sizes involved.
A solution is a mixture of ions or molecules very very small. Solutions are transparent. Meaning that you can see through them.
A suspension has bigger particle sizes and so it may look cloudy or murky.
A colloid is mixture where at least two types of substances are placed together.
An element is made of only one kind of atom
compound contains the atoms of two or more elements
Since they are different here is a example gold is made of only one kind of atom. So it is an element, but water is a mix of hydrogen and oxygen, so it is a compound
I hope you understand what Matter is now.