Physical and Cognitive Development Quiz

What percentage of adult size is the head at birth?

• 70 percent

• 50 percent

• 25 percent

• 100 percent

How much do U.S. babies' lengths roughly double during the first 2 years of life?

• 200 percent

• 150 percent

• 100 percent

• 50 percent

What is the role of increased myelination of neurons in brain development?

What are the effects of early exposure to technology-saturated environments?

What are the major milestones of infants' fine motor skills?

What is the significance of wariness of heights in infants?

How does practice affect the age at which infants reach motor milestones?

At what age do most children begin to walk independently?

• 18 months

• 15 months

• 12 months

• 9 months

What is the average weight of a newborn baby in the U.S.?

• 5 pounds

• 10 pounds

• 12 pounds

• 7.5 pounds

How many teeth do most children have by the age of 3?

• 10 teeth

• 30 teeth

• 20 teeth

• 24 teeth