View the animation below, then complete the quiz to test your knowledge of the concept.

1	Bones in the legs, arms, spine and pelvis grow
	A)	at different rates.
	B)	at the same rate.
	C)	until age 18, then they stop.
	D)	strongest after age 30.
2	Which of the following is not considered a weight bearing activity?
	A)	walking
	B)	running
	C)	swimming
	D)	jumping rope
3	Trusses and arches which help form an internal scaffolding network, are found in
	A)	bone marrow.
	B)	children only.
	C)	adults only.
	D)	trabecular bone.
4	At which of the following ages would calcium loss from bone be more than calcium deposits into bone, even when a high calcium diet is eaten?
	A)	18 months old
	B)	10 years old
	C)	18 years old
	D)	50 years old
5	Which mineral is most important throughout life to assist in maintaining strong bone?
	A)	potassium
	B)	calcium
	C)	sodium
	D)	phosphorus