Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Ex Input:
Question: What can be used to convert the energy provided by the sun to usable electrical energy? Answer: solar cells

Ex Output:
Solar cells convert the energy in sunlight to electrical energy. They contain a material such as silicon that absorbs light energy and gives off electrons.

Ex Input:
Question: What do scientists believe are the oldest eukaryotes? Answer: protists

Ex Output:
Scientists think that protists are the oldest eukaryotes. They most likely evolved from prokaryotic cells, as explained by the endosymbiotic theory. This theory is well-supported by evidence.

Ex Input:
Question: What two forms can fluids take? Answer: liquid or gas

Ex Output:
Fluid friction occurs in fluids, which are liquids or gases.