| A | B |
| Change or growth in a human being | Development |
| term used to refer to a child for the first year after birth | Infant |
| Term Used to refer to a child from the first year until the 3rd birthday | Toddler |
| Term referring to children ages 3-6 | Preschooler |
| Physical body changes in bone thickness, size, weight, vision, and coordination | Physical development |
| improvement of skills using the large muscles, such as running, skipping, and lifting weights | gross motor development |
| Improvement of skills using the small muscles, such as grasping, holding, and drawing | fine motor development |
| Growth in mental processes used to gain knowledge, such as thought, reasoning, and imagination | cognitive development |
| Growth in the two related areas of social and emotional skills | social-emotional development |
| Sequence of biological changes in a child giving the child new abilities | maturation |
| an automatic body response to a stimulus | reflex |
| order in which a child is able to perform new movements | motor sequence |
| understanding that objects continue to exist even if a person cannot see them | object permanence |
| Watching another person's behavior then acting it out | deferred imitation |
| 2-word phrases used by toddlers when they first learn to combine words | telegraphic speech |