# Material form
**Trait Number:** 7
**Layer:** Physical
**Bit Position:** 7
**Binary Encoding:** `00000010 00000000 00000000 00000000`
**UHT Code (self-encoding):** `02 00 00 00`
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# Icon
![[Icon7.png|200]]
## Definition
The entity is **composed of matter** — it has physical substance. This includes solids, liquids, gases, and physical materials at any scale, regardless of visibility or permanence.
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## When to Apply
Use this trait when the entity:
- Is made of **atoms, molecules, or physical substance**
- Has **mass, volume, or inertia**
- Exists in a form that occupies **physical space**
Avoid applying if the entity:
- Is purely **virtual, conceptual, or symbolic**
- Is a pattern, behavior, or algorithm without embodiment
- Exists only as **information** or in software/code form
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## Related Traits
- [[80 00 00 00 - Physical Object]]— Closely related; most physical objects have material form, but this trait focuses on *composition*, not *existence*.
- [[04 00 00 00 - Perceptible]] — Many material things are perceptible, but not all (e.g., microscopic particles, invisible gases).
- [[01 00 00 00 - Passive]] — Material things may also be passive, but not necessarily — some materials act or react.
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## Examples
- A block of wood
- A glass of water
- A copper wire
- A printed circuit board
- A drop of mercury
- A 3D-printed part
- A cloud (as condensed water droplets)
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## Commentary
This trait highlights **substance over presence** — it's about what something is *made of*, not whether it's *perceivable*, *static*, or *functional*. Even extremely small or imperceptible things (like a neutrino detector crystal) can have material form.
Use this trait when you want to emphasize **physical substance** versus *behavior*, *function*, or *symbolism*. For example, a sculpture and a lump of raw clay are both material — even if their meaning or purpose differs.
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