He was looking at Uranium Salts
Answer: you meet people that are far away and you can find anything you can think of such as insane theories.
Explanation: disadvantage HUB ahem.... i mean! gets away people who are close to you
The right answer is: constructivist approach.
This method of learning was developed by Jean Piaget and is based on the premise that students should be responsible and active participants in their own learning processes and not just to receive information passively.
The main characteristics of this learning method are the interaction and autonomy of the students and an example would be the realization of an experiment and the analysis of its results.
I hope this information can help you.
Native Americans lived here way before anyone else