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

[EX Q]: Passage: Viruses , like the one depicted in Figure below , are tiny particles that may cause disease. Human diseases caused by viruses include the common cold and flu. Do you think viruses are prokaryotes or eukaryotes? The answer may surprise you. Viruses are not cells at all, so they are neither prokaryotes nor eukaryotes. Answer: viruses
[EX A]: The common cold and flu are examples of human diseases caused by what tiny particles?

[EX Q]: Passage: Destructive interference in waves occurs when two troughs overlap. Answer: two troughs
[EX A]: Destructive interference in waves occurs when what things overlap?

[EX Q]: Passage: Chemical changes are changes in the makeup and chemical properties of matter. An example of a chemical change is wood burning. Answer: chemical changes
[EX A]:
What are changes in makeup and chemical properties of matter called?