Matter is anything that has volume and mass. It exists in three main states: solids have a definite shape and volume with tightly-packed particles; liquids have a definite volume but no fixed shape as their particles are loosely connected; gases have no fixed shape or volume as their distant particles take the shape of their container.

2. What is Matter
• Matter is anything that has volume and mass.
• Volume is the amount of space taken up, or occupied by an object.
• Mass is volume of matter that something is made of.

4. Solid
• A solid is defined as a state of matter with a definite shape and volume. In
contrast, liquids can change shapes, while gases can change both shape and
volume. The particles in a solid (atoms, molecules, ions) are tightly-packed
compared to liquids and gases.

6. Liquids
A liquid is a state of matter that has a definite volume, but no fixed shape. In
other words, a liquid takes the shape of its container. Liquids consist
of atoms or molecules that are loosely connected by intermolecular bonds. In
contrast, the atoms or molecules in a solid are fixed in a rigid shape, while the
particles in a gas are separated by great distances. Liquids have surface tension,
so they can wet surfaces.

8. Gases
A gas is a state of matter that has no fixed volume or shape. In other words, a
gas takes the shape and volume of its container. Gases condense into liquids or
ionize into plasma. The particles in a gas are more distant from each other than
in liquids. Gas particles may be elements or compounds. Example oxygen,
helium, carbon dioxide.