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