Which properties are characteristics of nonmetals? Check all that apply.

malleable
brittle
solid at room temperature
low density
electrical insulator
thermal conductor

Which of the following is an important function of child-directed speech? (a) it captures the infant’s attention and maintains communication. (b) it reduces the occurrence of infantile amnesia for the earliest memories of infancy. (c) it reduces the need for reciprocal interaction between caregivers and children. (d) it assists in prolonging rem sleep in infants.