Agoniometer measures
a. a joint's maximum range of motion
b. a joint's minimum range of motion
c. a joint's flexion
d. extension and hyperextension

A goniometer measures A. A JOINT'S MAXIMUM RANGE OF MOTION.

Range of motion is the maximum distance and direction a joint should be able to move. In human body, each joint can be measure for its range of motion with the help of goniometer.

Each joint has a range of possible motion and range of actual motion. This range of motion can be hindered by swelling, stiff muscles,  cerebral palsy, rheumatoid arthritis, excess muscle or fatty tissue, age, and bone structure.

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )