Answer:
This is a longitudinal research.
Explanation:
Longitudinal research refers to a type of research which takes <em>place over time</em>. It centers on the study of the <em>same variables through time</em> in order to observe the variable's changes.
In this case, psychologist study 5, 7 and 9 year olds and then study them again two years later.
Answer: Charge to mass ratio.
Explanation:
The Q/M ratio of a particle is the ratio of the charge to the Mass of that particle.
Answer:
1. represent objects with words and images.
Explanation:
Preoperational stage: In psychology, the term preoperational stage is one of the main parts or stages in the theory of cognitive development which was proposed by Jean Piaget and consists of a total four distinct stages.
The preoperational stage starts at the age of two years and lasts through seven years and is considered as the second in Piaget's theory. At this stage, a child starts or initiates talking, learns to manipulate different symbols, irreversibility, and engages in symbolic play.
The answer is C.
<span>In classical conditioning, the responses involved tend to be reflexive, but in operant conditioning, they are complex and not reflexive. Both classical and operant conditioning includes behaviors that are controlled by stimuli in the environment. However, they have a difference in terms of nature. Classical conditioning is a stimulus that produces behavior in a reflexive way, while operant conditioning is a stimulus that comes from punishment or reward.</span>
<span>In 1938 the United States Congress passed the Federal Food, Drug, and Cosmetic Act, generally referred to as FFDCA, FDCA, or FD&C, in order to give someone authority to the United States Food and Drug Administration, often referred to as the FDA. They were able to oversee the safety of any products that were related to food, drugs, or cosmetics.</span>
