'Mould' is both the singular and the plural, like 'sheep'.
it is called mold
The process of molding is shaping liquid or pliable raw material using a rigid frame called a mold or matrix.[1] This itself may have been made using a pattern or model of the final object.
mold...
Air in itself does not contain mold. Though it will carry the mold particles which help spread it around.
This is called a trace fossil. or a mold.
Fungi Mold is also called the Kingdom Mold.
Moisture contributes greatly to the growth of mold. Mold needs a damp/ wet environment to establish itself, and to grow.
No, mold itself is not flammable. It requires a heat source to burn. However, mold-infested materials may become combustible if they dry out and the mold spores become airborne.
a mold called Penicillium notatum
Mold itself is not sticky, but it can sometimes appear sticky due to the presence of moisture or other substances on its surface.
When mold is in the outdoor, when they grow in the outdoor, it is called outdoor mold. Actually where there is food molds grow there.
spore