In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

Input: Consider Input: Question: Mike is watching how particles of reactants function, and sees that they are very far apart. Considering that the concentration of them is very low, the chance of them colliding together is
Answer: low

Output: At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react.

Input: Consider Input: Question: Dana wants the gas to move with as little energy as possible so the particles can move slowly. Dana will then do this to the gas
Answer: cool

Output: If the gas is heated, the particles will move faster as they gain more energy.

Input: Consider Input: Question: Compared to sound waves travelling through a cup of ice water, would sound waves travelling through a cup of boiling water move
Answer: faster?
Output: For a given medium, sound waves travel more slowly at lower temperatures.