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 Q]: Question: What changes nitrogen gas from the atmosphere to nitrogen compounds that plants can absorb? Answer: bacteria
[EX A]: Bacteria change nitrogen gas from the atmosphere to nitrogen compounds that plants can absorb.

[EX Q]: Question: Solvation involves surrounding ions with what? Answer: solvent particles
[EX A]: Solvation involves surrounding ions with solvent particles.

[EX Q]: Question: What type of tissue is made up of cells that have the unique ability to contract? Answer: muscle tissue
[EX A]:
Muscle tissue is made up of cells that have the unique ability to contract, or become shorter. Muscles attached to bones enable the body to move.

