Question

practice it! select the statement(s) that would be considered descriptive investigations. an astronomer observed the orbital patterns of the moons of saturn and relayed the data in a scientific journal. a researcher is observing the eating patterns of alligators during winter months. a student is observing cells under a microscope and diagramming what is seen. a teacher recorded and compared the grades of students who missed more than 10 percent of a school year and those who did not. the teacher found that those who missed fewer school days had higher grades than those who missed more days. a scientist created a computer model of a weather system. she changed variables within the model and observed the effects on local weather patterns.

Explanation:

Descriptive investigations involve observing and recording data without making changes or testing hypotheses. The first three statements are about observing and recording - an astronomer observing moon - orbital patterns, a researcher observing alligator eating patterns, and a student observing and diagramming cells. The fourth statement involves comparison and analysis beyond just description. The fifth statement involves changing variables in a model, which is an experimental - like activity rather than just description.

Answer:

An astronomer observed the orbital patterns of the moons of Saturn and relayed the data in a scientific journal.
A researcher is observing the eating patterns of alligators during winter months.
A student is observing cells under a microscope and diagramming what is seen.