HOMINID SERIES. Lesson Plan. Skullduggery, Inc. 624 South B Street Tustin, CA (800) FAX (714)
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1 HOMINID SERIES Lesson Plan Skullduggery, Inc. 624 South B Street Tustin, CA (800) FAX (714)
2 HOMINIDS OBJECTIVE The hominid set provides an opportunity for an up close, hands on look at the major stages of human evolution. When finished, students should be able to (1) identify the cranial structure for each member of the evolutionary chain, (2) understand the timeline involved in human evolution and (3) comprehend some of the physical and social aspects of these ancient creatures lives. MATERIALS PROVIDED General information on the relationship between members of the evolutionary chain Specific information on each member of the evolutionary chain Hominid exercise sheet 5 hominid cranium replicas and 1 human skull replica Australopithecus afarensis Cranium Replica Australopithecus africanus Cranium Replica Homo habilis Cranium Replica Homo erectus Cranium Replica Neandertal Cranium Replica Human Skull Replica Suggested reading list Copyright 1996 Skullduggery, Inc. Page -2-
3 HOMINID SERIES INSTRUCTIONS & EXERCISES A. Divide your class into six groups. 1. Read the general information on hominids out loud to your class. 2. Pass out a cranium replica, the corresponding written information and an exercise sheet to each group. 3. Ask each group to examine their replica. Have students pay close attention to its shape and feel. 4. Without reading the specific information on their replica, ask them to fill out as much of the exercise sheet as possible. Challenge them to infer as much as possible from just examining their replica. (There is no corresponding information on the modern human skull. Challenge your students to fill out the exercise sheet from the knowledge they already possess.) 5. Allow them to read the information included on their replica and fill in the areas on their exercise sheet that they were unable to answer. 6. Instruct the groups to swap their replica with a replica they have yet to study. 7. Repeat steps A1 - A6. Page -3-
4 GENERAL INFORMATION ABOUT HOMINIDS Fossil hominid materials found throughout Africa, Asia and Europe are housed in museums in those respective countries. It is from this multitude of fossil fragments that noted paleoanthropologists study and accumulate knowledge about man s often disputed evolution to modern Homo sapiens. As more hominid fossils are found, accepted theories concerning the candidates for direct ancestry to the first hominids are either reinforced or changed. For a variety of reasons, reconstructions of hominid material are very difficult for the general public to obtain. The Skullduggery hominid series was sculpted to provide educators with a visual comparison between those species thought to be the beginnings of the human race. From various casts, photographs, published diagrams and text describing hominid fossil material and their reconstructions, sculptor Larry Williams has created the hominid series for Skullduggery. Each sculpture exhibits the general characteristics of its respective species. These sculptures should be used for visual comparison only, and not for comparing exact measurements among the various species. Anthropologists uncover fossil material from the various levels of the Earth s strata. The relative age of a fossil can be determined by testing the composition of mineral deposits absorbed from surrounding soil in which it was found. In many sites, the deeper stratums contain the older material. Erosion and upheaval of the Earth s surface can combine and even overlap these layers, making the determination of the age of a fossil very difficult. One system used for determining a more exact age of fossil material is called the radiometric dating method. This method, along with other new scientific techniques, is used to pinpoint more closely the date which living material died. As a result of extensive research and many tests performed on original fossil material, it has been determined that the first hominid emerged about 4 to 4.5 million years ago. Some of the fossil finds from that time period indicate that these creatures walked on two legs (bipedal) instead of four. This characteristic played a large part in placing these beings in the hominid category. All fossil hominid material found to date can be placed within two genera, the genus Australopithecus and the genus Homo. Austalopithecines are thought to have been small ape-like, bipedal creatures with a small brain and large face and teeth. There are four species in the genera Australopithecus: two gracile forms, A. afarensis and A. africanus, and two robust forms, A. boisei and A. robustus. Most anthropologists agree that the robust Australopithecines, A. boisei and A robustus, Page -4-
5 represent two species which became extinct. There is considerable controversy among anthropologists as to whether to include A. africanus in the direct line of evolution to Homo or with the two robust species which became extinct. A. afarensis, the oldest known Australopithecine, was a common ancestor to both gracile and robustus species. The first hominid fossil material classified as Homo is dated approximately 2 million years old. Some characteristics which separate the genus Homo from the genus Australopithecus are the increase in brain size and a reduction in the size of the face and the teeth. With in the genus Homo there are three species, Homo habilis, Homo erectus and Homo sapiens. Whether Homo habilis was the direct ancestor of A. afarensis or A. africanus is still very much debated. While Homo habilis material (2 million years old) was found exclusively in Africa, Homo erectus material (1.6 million years old) has been unearthed in Asia and Europe as well. Similarities between later H. erectus and early H. sapiens make it difficult to pinpoint exactly when the first Homo sapiens appeared. There is definate evidence that early forms of Homo sapiens existed 200,000 years ago. This early form of Homo sapiens went through many changes before it had the look of a truly modern man. The Neandertal is the earliest and most well known member of Homo sapiens. The skull of Neandertal has a combination of traits which can be found to some degree in Homo erectus, including an occipital bun, a very large brain cavity, a long & protruding face and a large nasal area. Page -5-
6 Australopithecus afarensis Southern Ape of Afar Existed 3 to 4 million years ago Sites of fossil discoveries - Laetoli (Tanzania), Hadar (Ethiopia); Koobi Fora Formation (Kenya) Endocranial capacity to 530 cc Estimated body mass kg General physical characteristics: Small brain Large, ape-like face Teeth size - smaller than apes, larger than modern man Gap between incisors and canines (diastema) 3 to 4 feet in height Walked on two legs (bipedal) Evidence suggests that family groups hunted for fibrous fruits and seeds for food. Although there is no evidence to suggest that A. afarensis used stone tools, it is quite possible that perishable tools were used, such as wooden sticks for digging. Page -6-
7 Australopithecus africanus Southern Ape of Africa Existed 2 to 3 million years ago Sites of fossil discoveries - Makapansgat, Sterkfontein and Taung (South Africa) Endocranial capacity to 530 cc Estimated body mass kg General physical characteristics: Larger brain when compared to estimated body weight Reduced brow ridge Reduced prognathism (flatter face) No gap in teeth (diastema) Larger teeth than modern man A. Africanus diet consisted mainly of fibrous fruits and seeds, however, it has been suggested that he may have hunted small animals for food, and quite possibly used very primitive stone tools. Page -7-
8 Homo habilis Handy Man Existed 1.5 to 2 million years ago Sites of fossil discoveries - Olduvai Gorge (Tanzania), Koobi Fora (Kenya), Swartkrans and Sterkfontein (South Africa) Endocranial capacity to 810 cc Estimated body mass - 48 kg General physical characteristics: Larger brain than Australopithecines Rounded forehead Smaller, more narrow face U shaped tooth row Evidence suggests that Homo habilis was able to make a variety of stone tools. The constructing of stone tools indicates the first evidence of an adaptive pattern for problem solving by hominids. Animal bones and stone tools found with Homo habilis remains suggest that this was a species of scavengers. There is some evidence which points out that Homo habilis may have occasionally hunted small game, but none to suggest that it was an organized hunter. Page -8-
9 Homo erectus Upright Man Existed 200,000 to 1.6 million years ago Sites of fossil discoveries - Oldavai Gorge (Tanzania); Lake Turkana (Kenya); Thomas Quarry (North Africa); Montmaurin and Mauer (Western Europe); Jinniushan, Zhoukoudian, Lantian and Hexian (Indonesia, China and Southeast Asia) Endocranial capacity to 1225 cc Estimated body mass - 53 kg General physical characteristics: Larger brain than H. habilis, smaller than H. Sapiens Flattened forehead More prognathism than H. sapiens Prominent brow ridges Smaller teeth than H. habilis, larger than H. sapiens Homo erectus was the first hominid to be found outside Africa. The stone tools found along side remains of Homo erectus were more sophisticated and advanced than those made by Homo habilis. There is evidence that Homo erectus was a skilled and organized hunter. Evidence also suggests that Homo erectus used caves for shelter and made other shelters where caves were not found. There is sufficient evidence to suggest that Homo erectus existed in small social groups which banded together for mutual benefit. Homo erectus utilized fire for warmth and cooking. Page -9-
10 Neandertal Existed 30,000 to 70,000 years ago Sites of fossil discoveries - France, Germany, Yugoslavia and Southwest Asia Endocranial capacity cc Estimated body mass 65 kg General physical characteristics: Large cranial capacity, larger brain than modern Homo sapiens Long, low cranium Occipital protrusion Broad, long nasal opening Projecting midface area Neandertals were quite intelligent. Remains of the European Neandertals indicate that to survive the harsh winters they lived in caves and very primitive tents made of animal bones and skin. Evidence of old hearths show that they warmed their tents and caves by burning wood and bones. There is additional evidence to suggest that they knew how to start fires by striking sparks from iron pyrites and using dried bracket fungus as tinder. The Neandertal made primitive clothing out of animal skin. This clothing possibly included very crude trousers, tunics and protection for feet. They were the first culture to show evidence of systematic burials of their dead. There is also some evidence of the beginnings of rudimentary art forms. Page -10-
11 Exercise Sheet Rank Name Time Existed Physical Discovery Brain Diet Characteristics Sites Size 1-6 Page -11-
12 Bibliography & Suggested Reading List Conroy (1990) Primate Evolution. New York: W.W. Norton & Co. Lambert (1987) The Field Guide to Early Man. New York: Facts on File Lewin (1987) Bones of Contention. New York: Simon & Schuster Relethford (1990) The Human Species. Mountainview: Mayfield Publishing Co. Tattersall, Denton, Van Couvering (1988) Encyclopedia of Human Evolution and Prehistory. New York & London: Garland Publishing Educational Kits and Supplies 0200* Contemporary Human Male skull...$ Shipping... $ * Contemporary Human Female skull...$ Shipping... $ * Australopithecus afarensis cranium...$ Shipping... $ * Australopithecus africanus cranium...$ Shipping... $ * Homo habilis cranium...$ Shipping... $ * Homo erectus cranium...$ Shipping... $ * Neandertal cranium...$ Shipping... $ Fossil Kit I...$39.95 Shipping... $ Fossil Kit II...$39.95 Shipping... $ Fossilworks (4fossil molds)...$29.95 Shipping... $ Fossilworks (6 fossil molds)...$39.95 Shipping... $ Dino Traces, Velociraptor...$39.95 Shipping... $ Dino Traces, Triceratops...$39.95 Shipping... $ Dino Traces, Tyrannosaurus rex...$39.95 Shipping... $ Animal Tooth Kit...$79.95 Shipping... $ Hydrostone (10 lbs.)...$10.00 Shipping... $ Clay (10#, 40 sticks)...$13.00 Shipping... $6.00 * Oak & Acrylic stand for skulls & craniums...$25.00 Shipping... $7.00 * If stand included with skull or cranium...$25.00 Shipping... $1.00 Multiple items are combined for reduced shipping & handling, call for quote. Page -12-
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