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

Passage: Noble gases are also used to fill the glass tubes of lighted signs like the one in the Figure below . Although noble gases are chemically nonreactive, their electrons can be energized by sending an electric current through them. When this happens, the electrons jump to a higher energy level. When the electrons return to their original energy level, they give off energy as light. Different noble gases give off light of different colors. Neon gives off reddish-orange light, like the word "Open" in the sign below. Krypton gives off violet light and xenon gives off blue light. Answer: noble
What type of gas is used to fill glass tubes of lighted signs?

Passage: Many samples have a lot of variation in measurements. Variation can be described with a statistic called the range. The range is the total spread of values in a sample. It is calculated by subtracting the smallest value from the largest value. Answer: range
What term is used to describe the total spread of values in a sample?

Passage: Each hemisphere of the cerebrum is divided into four parts, called lobes. The four lobes are the:. Answer: 4
How many lobes is each hemisphere of the cerebrum divided into?