These are known as Pumice stone.
A tiny fragment of heated material is called a spark. Sparks are small, glowing particles that are ejected from a fire or when striking two hard surfaces together.
strike and slip
It is called irrigation and water was carried around with aqueducts.
The negatively charged OH fragment from water ionization is called a hydroxide ion (OH-). It is formed when a water molecule (H2O) loses a proton (H+) to become a hydroxide ion.
A material covering a hole is called a patch. It can be used to repair damage or prevent something from escaping.
The network of rabbit tunnels is called a Warren
It is called a fragment, I am not sure though, that's what my teacher told me.
A 12-sided flat-shaped fragment is a dodecagon.
A sentence missing a subject or a verb is a fragment.
tunnels
A piece of a sentence is called a fragment.
Many of New York City's homeless live in the abandoned subway tunnels, especially during the winter months.
Yes, it is called Closer
There is no special word for a fear of tunnels. However, it is likely a form of claustrophobia, which is a fear of enclosed spaces.
sentence fragment
underground railroad
I'm pretty sure that the answer is an INVERSION