Physical Development

Question 1

Gross motor milestone age for: chin and then chest up in prone position, props on forearms in prone position, rolls to side

Answer 1

1-3 months

Question 2

Gross motor milestone age for: sits with trunk support and then with pelvic support, rolls front to back and then back to front, puts arms out when falling

Answer 2

4-6 months

Question 3

Gross motor milestone age for: sits without support steadily, pulls to sitting/kneeling position, begins creeping, pulls to stand

Answer 3

7-9 months

Question 4

Gross motor milestone age for: creeps well, cruises furniture with both hands and then one hand, walks with two hands held and then with one hand, takes independent steps

Answer 4

10-12 months

Question 5

Gross motor milestone age for: stands without pulling up, walks well, stoops to pick up toy, creeps up stairs, walks carrying toy

Answer 5

13-15 months

Question 6

Gross motor milestone age for: walks backward, walks up stairs with one hand held, runs well, throws ball while standing

Answer 6

16-18 months

Question 7

Gross motor milestone age for: walks down stairs with one hand held, walks up stairs and then downstairs holding rail with both feet on each step, kicks ball, throws ball overhand, jumps from bottom step with one foot leading

Answer 7

19-30 months

Question 8

Gross motor milestone age for: walks swinging arms opposite of legs, balances on one foot for 3 seconds, walks up stairs with alternating feet and without holding rail, pedals tricycle, catches ball with stiff arms

Answer 8

31-36 months

Question 9

Gross motor milestone age for: hops on one foot two or three times, balances on one foot 4 to 8 seconds, throws ball overhand 10 feet, catches bounced ball

Answer 9

4 years

Question 10

Gross motor milestone age for: walks down stairs with alternating feet and without holding rail, hops on one foot 15 times, balances on one foot for more than 8 seconds, walks backward heel-toe, jumps backward

Answer 10

5 years

Question 11

Most neurons are present at birth and the increase in size is due to three factors:

Answer 11

• Synaptogenesis
• Growth of new dendrites
• Myelination

Question 12

The least well-developed sense at birth is:

Answer 12

vision

Question 13

By _____ months, visual acuity is close to that of adults.

Answer 13

7-8 months

Question 14

Babies prefer the faces of their caregivers over strangers at what age?

Answer 14

1-2 months

Question 15

Depth perception occurs in three stages from 0-9 months. What are the stages and timeframes?

Answer 15

• Kinetic (2 weeks)
• Binocular (9 weeks)
• Pictorial (5-6 months)

Question 16

Starting around age 40, adults start to show signs of diminished vision, including what signs?

Answer 16

• Presbyopia (farsightedness - loss of near vision)
• Diminished ability to see in dim light
• Increased sensitivity to glare
• reduced color discrimination
• Decreased depth perception

Question 17

Infants begin to prefer the voices of their caregivers over strangers by…?

Answer 17

A few days after birth

Question 18

This auditory ability emerges a few days after birth, declines between 2-4 months of age, and re-emerges and becomes fully developed by about 12 months of age.

Answer 18

Auditory localization - turn their head towards a sound

Question 19

By age 40, adults start to slowly develop hearing problems, the first of which is usually…

Answer 19

Presbycusis - a decrease in the ability to perceive high frequency sounds.