Scientists can use two different types of data in an experiment. When they're collecting observations, they're using (4) When they're using numbers and measurements, it is (5) There is a variety of ways to display this data. If you're comparing pieces of data, you can use a (6). A similar way to display that kind of information is a pie chart or a (7) . If you're comparing change over time, you will use a (8) OUTPUT STATION