No Fixed Shape and Volume

Air is a gas that has no fixed shape and volume. It is one of the three states of matter, the others being solid and liquid. Below are some points that explain why air has no fixed shape and volume:

- No fixed shape: Air has no fixed shape because the particles that make it up are free to move around in all directions. When air is contained in a container, it takes the shape of the container. For example, if air is blown into a balloon, it takes the shape of the balloon. If the balloon is deflated, the air inside will escape and take the shape of the surrounding space.
- No fixed volume: Air has no fixed volume because it can be compressed or expanded. When air is compressed, its volume decreases and when it is expanded, its volume increases. For example, when air is pumped into a tire, its volume increases and when air is let out of a tire, its volume decreases.

Comparison with Water and Ice

Unlike air, water and ice have a fixed volume and shape. Below are some points that explain why:

- Water: Water is a liquid that has a fixed volume but no fixed shape. It takes the shape of the container it is in, but it always has the same volume, unless it evaporates or freezes.
- Ice: Ice is a solid that has a fixed shape and volume. It maintains its shape and volume unless it melts or is broken.

Conclusion

In conclusion, air has no fixed shape and volume because it is a gas that can be compressed or expanded and takes the shape of its container. Water and ice, on the other hand, have fixed volumes and shapes because they are liquids and solids, respectively.