Benzene is a colorless liquid with a sweet odor. It evaporates into the air very quickly and dissolves slightly in water.
In psychology the term, early childhood is usually defined as the time period from the age of two until the age of six or seven years. There are three simultaneous development stages:
Early childhood is not only a period of amazing physical growth, it is also a time of remarkable mental development. Cognitive abilities associated with memory, reasoning, problem-solving and thinking continue to emerge throughout childhood.