Trial and Error best describes the problem-solving approach to the concrete operational thinker because children during 7 to 12 years old think unsystematically for a solution.
Moreover, concrete operational thinkers uses several methods to solve a problem. When one method does not work, then another method is use until it satisfy the problem. This example defines trial and error method.
Answer:
A. True
Explanation:
A node is a point along with a standing wave where there is a minimum amplitude. The opposite of it is an anti-node, a point where the amplitude is at maximum.
In a standing wave, the nodes are located at equally spaced intervals and in there the amplitude is zero.
I hope this answer helps you.
