Match the following 1. applied research research that expands knowledge in a particular area 2. basic research research that results in a product that can be sold for profit 3. control the experimental factor that is changed by the scientist 4. dependent variable a proposed explanation for a scientific problem that itself can be tested by experimentation 5. empirical evidence the experimental factor that changes in response to a change in the independent variable 6. hypothesis observational evidence 7. independent variable a quantity in an experiment that remains unchanged or constant