Matter is anything that has mass and occupies space. What an excellent definition. The mass of an object is a measure of how hard it is to start the object moving or how hard it is to change its speed or direction once it is moving. Do not confuse mass with weight . Although the two terms are commonly used interchangeably, they are not the same.
Weight is a measure of the force or attraction of gravity on an object.
The weight of an object changes as the gravitational force on the object changes. The mass of an object does not depend on gravity so it never changes. The person has a mass of 60 kg on the moon but weighs 10 kg on the moon. Composition of Matter Matter is the physical material of the Universe. Matter is made up of relatively few elements.