10 Questions
What percentage of their body weight do most newborns lose in the first few days after birth?
5 to 7 percent
How much does the average newborn weigh at birth?
7½ pounds
At what age do newborns double their birth weight?
4 months
What percentage of their adult weight do children attain by the age of 2?
One-fifth
What percentage of its adult weight is the newborn's brain at birth?
25%
By what age is the brain about 75% of its adult weight?
2 years
How many main lobes are in each hemisphere of the brain?
4
What is the process called when the brain's hemispheres specialize in different functions?
Lateralization
How much does the average 2-year-old weigh?
26 to 32 pounds
How much does the average 2-year-old grow in height per month?
1 inch
Test your knowledge of infant development at 8 months, including object permanence, symbolic function, language development, and memory storage. Understand how children's cognitive abilities evolve at this stage. Quiz yourself on the milestones achieved by infants at 8 months.
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