1) Environmental factors that can exert a negative impact on prenatal development are termed ____________. 2) Piaget’s ____________ developmental theory focuses on ways in which children learn, think, reason, and remember. 3) During Piaget’s ____________ stage of development, infants learn about objects by physically handling them. 4) The inability to see events from others’ perspectives during Piaget’s preoperational stage is called ____________. 5) Children in Piaget’s sensorimotor stage lack ____________, the understanding that objects continue to exist even when out of view. 6) If a 5-year-old is unable to see others’ perspectives and thinks that everyone experiences things as she does, she is demonstrating ____________. 7) A nine-year-old who is unable to multiply and divide is delayed in reaching Piaget’s ____________. 8) A teenager is most likely functioning in Piaget’s ____________. 9) A child who is able to demonstrate hypothetical reasoning resides cognitively in Piaget’s stage of ____________. 10) During Piaget’s ____________ stage of development, children begin to gain proficiency with mathematical functions including division and multiplication.