Sugar is definitely a chemical form of matter, but it doesn't have a definite shape or volume. Here's why:

* Matter: Sugar is made up of atoms (carbon, hydrogen, and oxygen) bonded together, making it a chemical substance.

* Definite Shape: Sugar can take on the shape of its container. If you put sugar in a bowl, it will take the shape of the bowl. If you put it in a bag, it will take the shape of the bag.

* Definite Volume: Sugar has a definite volume, but it's not fixed. The volume of sugar can change depending on how tightly it's packed.

So, while sugar is matter, it's considered a solid that's not rigid and can take on the shape of its container.