Given a scientific passage and an answer, generate a question for the given answer.

Passage: Matter can be classified as transparent, translucent, or opaque depending on how it interacts with light. Answer: opaque
Depending on how matter interacts with light, it can be classified as transparent, translucent, or what?

Passage: Many genetic disorders are caused by mutations in one or a few genes. Other genetic disorders are caused by abnormal numbers of chromosomes. Answer: genetic disorders
What type of disorders are caused by mutations in genes or abnormal numbers of chromosomes?

Passage: Most metalloids have some physical properties of metals and some physical properties of nonmetals. They fall between metals and nonmetals in their ability to conduct heat and electricity. They are shiny like metals but brittle like nonmetals. All exist as solids at room temperature. Answer: silicon
What is an example of a metaloid element?