The word terracotta means "baked earth". It is a color I would most commonly refer to as clay, or an orange based brown. If you've seen the very common clay flower pots, they are referred to as terracotta.
terracotta
Terracotta is a type of pottery
Terracotta clay!
the terracotta army
The terracotta warriors are in Xi'an.
The man that ordered the terracotta army would have been Emperor Qin Shi Huang. This would be because the emperor had absolute monarch which means that he made all the final decisions.
terracotta work
The best terracotta worrior is the general,
The Terracotta Dog was created in 1996.
the colour of the terracotta worries is YELLOW
It could be, or not, depending on the sentence. The word terracotta (a ceramic) can be a noun or adjective. If the subject of the sentence is something "made of terracotta" then it will be a predicate adjective. (e.g. The roof is mostly terracotta. = a terracotta roof) But if the subject refers to a material, it is a predicate nominative (e.g. For some building uses, the material will be terracotta.)