Scientists have recently shown that adults can grow the parts of their brains that control their abilities-like the ability t do math or even to juggle. Scientists found a group of people who did not know how to juggle. They took half and taught them how to juggle for three weeks, and noticed that their brains grew new cells; the other half of the group was not taught how to juggle, and their brains did not grow.
1. Is this scenario an observational study or a controlled experiment? Explain
2. When the scientist spilt
The group into two teams then how should they have chosen the people who learned how to juggle;
3. Why is it important to use the method used to describe this?