Question

practice it! select the statement(s) that would be considered descriptive investigations. 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 researcher is observing the eating patterns of alligators during winter months. a student is observing cells under a microscope and diagramming what is seen. an astronomer observed the orbital patterns of the moons of saturn and relayed the data in a scientific journal. 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 manipulating variables. The teacher comparing student grades based on attendance, the researcher observing alligator eating patterns, the student diagramming cells under a microscope, and the astronomer observing Saturn's moon orbital patterns are all descriptive as they are just observing and recording. The scientist creating and manipulating a computer - model of a weather system is an experiment as variables are being changed.

Answer:

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