Question 1
Which of the following is true of most prenatal dangers to the developing fetus?
◦ They are related to maternal nutrition.
◦ They are a problem only in developing countries.
◦ They are preventable.
◦ They are related to exposure to toxins.
Question 2
Which of the following principles suggests that physical properties of substances, such as volume, number, and mass, remain constant despite changes in their shape or appearance?
◦ centration
◦ conservation
◦ egocentrism
◦ object permanence