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

[Q]: Passage: Similarly, monoprotic bases are bases that will accept a single proton. Diprotic acids contain two ionizable hydrogen atoms per molecule; ionization of such acids occurs in two steps. The first ionization always takes place to a greater extent than the second ionization. For example, sulfuric acid, a strong acid, ionizes as follows: K a1 = more than 10 2 ; complete dissociation. Answer: accepts one proton
[A]: What is the basic characteristic of monoprotic bases?

[Q]: Passage: Descriptive statistics and graphs help organize data so patterns and trends are more apparent. Descriptive statistics include the mean and range. Types of graphs include bar, circle, and line graphs. Answer: graphs
[A]: Bar, circle, and line are all types of what?

[Q]: Passage: There are two major types of seismic waves. Body waves travel through the Earth's interior. Surface waves travel along the ground surface. In an earthquake, body waves are responsible for the sharp jolts. Surface waves are responsible for the rolling motions that do most of the damage in an earthquake. Answer: surface waves
[A]:
What are the rolling motions during an earthquake called?