Final answer:
One way to scientifically test the brain is to measure brain activity while performing a task, such as using fMRI to generate a map of active areas. Another method is to have the subject perform a visual task and measure activity all over the brain.
Step-by-step explanation:
An easy way to test the brain scientifically is by measuring brain activity while performing a task. One common method for this is using functional magnetic resonance imaging (fMRI), which generates a map of the most active brain areas. Another approach is to have the subject perform a visual task and measure activity all over the brain. For example, the subject can be shown photographs of familiar and unfamiliar faces and instructed to press a button if they recognize the person in the photo.