What Makes Bones Hard? Can You Make ‘Rubber’ Bones by Removing Minerals?
|Grade Level:||K-5th Grade |
|Time Required:||Less than 1 week |
|Materials:||Readily available |
- After your next meal of chicken, save the chicken bones.
Wash and clean them thoroughly (but gently) under warm water
Allow to dry
Place the bones in the jar
Pour in enough vinegar to completely cover the bones
Each day check each bone, discover whether the smaller bones become ‘rubbery’ before the larger, thicker bones
Let the bones sit for three days total (add a lid to hide the smell)
Pour out the vinegar and remove the bones from the jar
Are the bones bendable?
|Type of Bone||Day 1 ||Day 2 ||Day 3
||Some of the smaller bones (neck)||Yes
Bones are made of calcium and phosphorous compounds. These minerals are responsible for making bones hard and stiff. By introducing vinegar, a mild acid, we are able to dissolve these minerals leaving the remaining materials in the bone flexible. It is possible to turn a regular chicken bone into a ‘rubber’ bone.
Bone Formation & Healing,
Basic Bone Biology,
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