An example of a testable scientific question is one that includes two variables; the independent variable and the dependent variable. For example: Does the angle of a ramp change the distance a toy car will travel? This question has an independent variable (ramp angle) and dependent variable (distance the car travels).A system of knowledge about the physical, chemical, and biological universe and the things that occur in it is called science. It is an objective observation that explains the basic rules of nature. Another approach to defining science is as the information gained through practice.