In humans, the calcaneus (/kaelËkeÉªniËÉs/ ; kÃ¦lËkeÉªniËÉs from The latin calcaneus or, calcaneum meaning) heel or heel bone is a bone of the tarsus of the foot which constitutes the. heel
1 Intensive properties, such as density and color, do not depend on the amount of the substance present. 2  Physical properties can be measured without changing a substance's chemical identity.  Chemical properties can be measured only by changing a substance's chemical identity.
Another textbook I consulted defined chemical property this way: chemical properties describe the way a substance may change or react to form other substances. One example was given: flammability-the ability of a substance to burn in the presence of oxygen. Some substances (wood, alcohol) are very flammable, others are not.