Matter is composed of mass and space. Let's break down this concept further.

1. What is matter:
Matter is anything that occupies space and has mass. It can be found in various forms such as solids, liquids, and gases. Everything around us, including objects, substances, and even living organisms, is made up of matter.

2. Composition of matter:
Matter is composed of two fundamental aspects: mass and space.

- Mass: Mass refers to the amount of matter present in an object. It is a measure of the quantity of atoms and molecules that make up the object. Mass is typically measured in units like grams or kilograms. For example, if you have a ball of clay, its mass would depend on the amount of clay present.

- Space: Space refers to the three-dimensional area that matter occupies. It is the amount of room or volume that matter takes up. Every object or substance has a certain amount of space it occupies. For instance, if you have a glass of water, the water fills a specific volume within the glass.

3. Matter and energy:
While energy is an important aspect of the physical world, it is not considered a component of matter itself. Energy is the ability to do work or cause changes. It can be transferred between objects or converted from one form to another. Although matter and energy are related, they are distinct concepts. Matter is the substance that possesses mass and occupies space, while energy is a property associated with the motion or interactions of matter.

4. Properties of matter:
Matter also possesses properties that help us classify and identify different substances. These properties include physical properties (such as color, shape, and density) and chemical properties (such as reactivity and flammability). These properties are characteristics that describe how matter behaves or reacts under certain conditions.

In conclusion, matter is composed of mass and space. Mass refers to the amount of matter present, while space refers to the three-dimensional area occupied by matter. Energy, on the other hand, is separate from matter and is related to the motion or interactions of matter. By understanding the composition of matter, we can better comprehend the physical world around us.