Experiment: Calcium The bones in your body are made of a chemical mixture of inorganic salts and organic materials. A high concentration of calcium helps keep your bones hard. When your daily diet lacks calcium, your bones may be affected. The liquids in this experiment serve to extract the calcium from the bone. Without calcium, bones become limp and unable to support the body. Serious disease can occur. Milk, cheese, yogurt, vegetables such as broccoli and kale, as well as calcium-fortified foods and beverages are good sources of calcium for the body. Drinking other beverages, not fortified by calcium may have a negative impact on your bones. Try this experiment: Supplies needed: Two clean, dry, chicken leg bones. Household vinegar and a cola soft drink. Two bowls large enough to lay the bone flat in the bottom of the container. Procedure: Place a clean chicken bone in the bottom of each bowl. Pour in enough vinegar to completely cover the chicken bone in one bowl. Pour in enough cola to completely cover the chicken bone in the other bowl. Allow the bones to sit in the vinegar for 5-7 days. After 5-7 days, remove the chicken bones and observe them.