Entry Exam Category: Graduate & Professional Program Admission Exams
Course: Praxis
Exam: Praxis Elementary Science 5005 Practice Test
Practice Question
A student is conducting an experiment to determine how the temperature of water affects the rate at which sugar dissolves. The student uses four beakers with the same amount of water at different temperatures: 20C, 40C, 60C, and 80C. The student adds the same amount of sugar to each beaker and stirs for the same length of time. Which of the following is the independent variable in this experiment?
Answer Choices
- A: The amount of sugar added to each beaker.
- B: The temperature of the water in each beaker.
- C: The time it takes for the sugar to dissolve.
- D: The amount of stirring done in each beaker.
Correct Answer: B
Rationale: Independent variable manipulated: temperature. A,D: Constants. C: Dependent, measured. IV changed to observe effect.