It's not entirely accurate to say that powdered chalk is more like a liquid than a lump of chalk. While both are forms of calcium carbonate, they have vastly different properties due to their physical structure.

Here's why:

* Particle size: Powdered chalk is made up of tiny particles, while a lump of chalk is a solid mass. These tiny particles in powder have a larger surface area to volume ratio compared to a lump.

* Intermolecular forces: The forces between the particles in a powder are weaker than the forces holding together a solid lump. This allows the particles in a powder to move more freely and interact with each other more readily.

However, powdered chalk still doesn't behave like a liquid. It doesn't flow readily like water, nor does it take the shape of its container.

A better way to think about the difference is in terms of:

* State of matter: A lump of chalk is a solid. Powdered chalk is still considered a solid, but its small particle size gives it some properties that seem liquid-like, like the ability to flow more easily.

* Surface area: Powdered chalk has a much larger surface area than a lump of chalk. This larger surface area can lead to increased reactivity and interactions with other substances.

So, while powdered chalk may exhibit some liquid-like properties, it is still a solid, just with a very fine particle size.