Question

learning objective: recognize physical development in middle and late childhood.

at what age does the brain reach its adult size?

a.) 11
b.) 13
c.) 7
d.) 9

Explanation:

Analyze brain volume growth milestones

Using the Brain Maturation knowledge point, we evaluate when the physical size of the brain reaches its adult volume. During early childhood, the brain grows rapidly. By age 2, it is about 75% of its adult weight, and by age 6, it reaches approximately 90% to 95% of its adult size.

Identify the target age

By age 7, the brain has reached nearly 100% (about 95% or more) of its adult size. Although functional development, myelination, and synaptic pruning continue well into adolescence and emerging adulthood, the physical size/volume of the brain is essentially at its adult size by age 7.

Answer:

• a.) 11
• b.) 13
• c.) 7 (Correct answer)
• d.) 9