States of Matter

1. The Solid State: Solids have a definite shape and fixed size. The particles in solids are packed tightly together, which is why solids are usually hard and firm. Solids cannot be easily compressed or squashed because there is no space between the particles.

Example of Solids:

• Ice is a solid form of water, and it has a definite shape.
• Other examples include wood, stone, pencils, and books.

2. The Liquid State: Liquids do not have a definite shape, but they do have a fixed volume. The particles in a liquid are more loosely arranged than in a solid, which allows liquids to flow and take the shape of the container they are in. Liquids are not easily compressed, as the particles are still fairly close together.

Example of Liquids:

• Water is a liquid. It flows and takes the shape of any container, like a glass or bottle.
• Other examples of liquids include milk, juice, and oil.

3. The Gaseous State: Gases do not have a definite shape or a fixed volume. They will spread out and fill any space they are in. The particles in gases are very far apart and move around freely in all directions. Gases can be easily compressed because there is a lot of space between the particles.

Example of Gases:

• Air is a mixture of gases, including oxygen and nitrogen. You cannot see air, but it fills the space around us.
• Other examples include steam, carbon dioxide, and helium (which is used in balloons).