TIMELINE OF LIFE

The time line of life represents the beginning of life on earth from the simplest forms through the appearance of human beings. A great variety and magnificence of life is presented, with each organism a contributor to a vast cosmic scheme. It traces the Paleozoic, Mesozoic, and the Cainozoic periods, beginning with the kingdom of Trilobites and ending with the human being. The teacher indicates on a time line where vertebrates began, followed by fish and plants, then amphibians, reptiles, birds, and mammals. This time line is the basis for lessons in chemistry, nutrition, categories of animals and plants, care and requirements of different animals, and their interrelationship with an ecological system. Students are introduced to formal scientific language of zoology, botany, and anthropology.