Consider a solution that contains dissolved oxygen gas. To raise the concentration of oxygen gas in the solution, one could the temperature of the solution and/or the pressure of the oxygen gas above the solution.​

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding.i