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:
Kidsdata.org includes the following measures of early care and education: 1  Children Ages 3-5 Not Enrolled in Preschool or Kindergarten, for regions with 65,000+ residents as 1-year estimates, by Age, and by Race/Ethnicity; 5-year estimates are also provided for regions with 10,000+ residents and for Legislative Districts.