Q: Given a scientific passage and an answer, generate a question for the given answer.
Passage: Diamond is a network solid and consists of carbon atoms covalently bonded to one another in a repeating three-dimensional pattern. Each carbon atom makes four single covalent bonds in a tetrahedral geometry. Answer: a diamond
A:
What is a network solid and consists of carbon atoms covalently bonded to one another in a repeating three-dimensional pattern?