Family responsibilities often increase in middle age, as many adults are caring both for their children and for their aging parents.

Sound is a ____ form of energy and is the result of ____

a. wave; vibrating molecules b. particle; photons c. chemical; molecular breakdowns d. moving; vibrating photons

Shamona, a pregnant mother in Flint, Michigan, is concerned about the drinking water, which shows high levels of lead. Shamona should know that high levels of prenatal lead exposure are related to __________

A) facial abnormalities and heart defects B) defects of the genitals and urinary tract C) low birth weight and brain damage D) a variety of childhood cancers