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

[EX Q]: Passage: The global pattern of precipitation is influenced by movements of air masses. For example, there is a global belt of dry air masses and low precipitation at about 30 N and 30 S latitude. Answer: air masses
[EX A]: The global pattern of precipitation is influenced by movements of what?

[EX Q]: Passage: A snowflake is made of ice, or water in the solid state. A solid is one of four well-known states of matter. The other three states are liquid, gas, and plasma. Compared with these other states of matter, solids have particles that are much more tightly packed together. The particles are held rigidly in place by all the other particles around them so they can't slip past one another or move apart. This gives solids a fixed shape and a fixed volume. Answer: plasma
[EX A]: What state of matter completes the list: solid, liquid, gas?

[EX Q]: Passage: Some mixtures are homogeneous. This means they have the same composition throughout. An example is salt water in the ocean. Ocean water everywhere is about 3.5 percent salt. Answer: homogeneous
[EX A]:
Mixtures that have the same composition throughout are known as what kinds of mixtures?