Which of the following would be considered a source of error in an experiment? a. the measurement was recorded in the wrong place in the data table. b. half of a liquid sample was spilled when it was poured from the graduated cylinder into the beaker. c. the collected data did not to answer the research question. d. the mice in the experimental group did not always drink the orange juice that they were given.

Every time there is a full moon, mrs. cook insists that students in her classes display strange behavior. what would be the best way for her to prove the validity of her theory? a. keep a journal of student behavior during different phases of the moon cycle b. research data to find concrete evidence of a link between the moon cycle and human behavior c. ask students to keep a journal of how they are feeling during different phases of the moon cycle d. survey other teachers in the building to see if they notice similar behaviors during the full moon