Aim: Who came first? An exercise on Human Evolution HW #14 Chapter 32 read pages 833-841 Motivation: tie your shoe laces without your thumb
Arrange the skulls according to who you think came first • Make a list of the skull characteristics that you are looking at to determine who came first
………Humans share a common ancestor with other primates, we did not evolve from them Aim:What are the characteristics of Hominids?
Use your detective skills and Look at the tracks and answer the following questions • Who probably made the tracks? • How were they moving , walking, running? • What interactions do the tracks suggest?
In 1976, members of a team led by Mary Leakey discovered the fossilized footprints of human ancestors in Laetoli, Africa. The footprints were formed 3.5 million years ago when at least two individuals walked over wet volcanic ash. The wet ash hardened like cement and was then covered by more ash. What are the characteristics of Hominids?
Able to walk upright -hominid footprints at Laetoli in Tanzania Developed thumbs Developed large brain (more brain matter) Characteristics of the Hominid Family Lucy The Benchmark of Human Ancestry
Building bodies that stand up Section 32-3 Comparing Human and Gorilla Skeletons Modern Human Modern Human Modern Gorilla Modern Gorilla Skull atopS-shaped spine Spinal cord exitsat bottom of skull Arms shorter thanlegs; hands do not touch groundduring walking Pelvis is bowl-shaped Thigh bones angledinward, directlybelow body Skull atopC-shaped spine Spinal cord exitsnear back of skull Arms longer thanlegs; hands touch ground during walking Pelvis is longand narrow Thigh bones angledaway from pelvis