Given a scientific question, generate a correct answer to it.

Example Input: What "kind" of water may take longer to become contaminated than surface water, while the natural cleaning process may take longer?
Example Output: groundwater

Example Input: What is the name for the process where data in the genes is transferred to amino acids?
Example Output: translation

Example Input: What are the ionic compounds that produce negative hydroxide ions when dissolved in water?
Example Output:
bases