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

[Q]: Passage: Dissolved substances have a higher entropy value than their corresponding precipitate. Answer: entropy
[A]: What value of dissolved substances is higher than that of their corresponding precipitate?

[Q]: Passage: Carbohydrates include sugars, starches, and fiber. Sugars and starches are used by the body for energy. One gram of sugar or starch provides 4 Calories of energy. Fiber doesn't provide energy, but it is needed for other uses. At age 13 years, you need about 130 grams of carbohydrates a day. Figure below shows good food sources of each type. Answer: 4
[A]: How many calories of energy does one gram of sugar or starch provide?

[Q]: Passage: As food is pushed through the GI tract by peristalsis, it undergoes digestion. Digestion is the process of breaking down food into nutrients. There are two types of digestion: mechanical digestion and chemical digestion. Answer: digestion
[A]:
The process of breaking down food into nutrients is known as __________