Matter

Matter is everything that takes up space. The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w=mg. Since the weight is a force, it's SI unit is the newton. Mass  In physics, the property of matter that measures its resistance to acceleration. Roughly, the mass of an object is a measure of the number of atoms in it. The basic unit of measurement for mass is the kilogram. volume is three-dimensional space occupied by a gas, liquid or solid. Scientists measure volume in cubic units, such as liters, cubic meters, gallons and ounces. The most common equation to find volume is mass divided by density. They are all measured by using a balance, except volume which you use a graduated cylinder.

Density is the amount of volume in an object, and the formula is D=M/V. 

There are three types of matter and they are Solid, Liquid, and Gas. A solid is when the molecules are tightly squeezed together and are in an organized space. Liquid the molecules are spread out alittle and are freely moving. And finally gases go crazy and always bounce of each other. Matter changes form when energy is taken or given which is how they get to those forms.