Interactive exercise. Assistance may be required. Look at these true and false statements from the U.S. Geological Survey. Decide if each statement is true or false, and then click on the appropriate button to submit your answer.


So, what is "good science?" Sound scientific investigations need to be designed and performed in a way that is objective and that is bias free. Two main types of bias are sampling bias and measurement bias.

Interactive exercise. Assistance may be required. Click on each box to learn more about each type of bias.