Science Homework Help

Goal

Use the modules and review resources to complete the chart on this handout comparing skull features of the chimp, human, Australopithecus africanus, Homo habilis, Homo erectus, Homo neanderthalensis, and Homo sapiens. Refer to the module pages for images of skulls of the species.

Instructions

Refer to the module page Week 7 – Skull Images for the Assignments (Genus Homo) for images and 3-D rotations of the skulls you need to describe and compare. You will also find Week 7 – Comparing and Measuring the Skull (Genus Homo) useful.

Open the worksheet An111 Comparing Genus Homo Skulls.docx

Actions

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1. Present or absent: When a feature is either there or not, you can use a + for present and – for absent. For example, “presence of sagittal crest” can be answered + or –.
2. Describe: When you are asked to describe a feature, do so with a few words or short phrase. For example, “shape of dental arcade” can be answered “U-shaped.”
3. Compare: When you are asked to compare, you need to ask “compare to what?” If there are three skulls being compared, you might say X and Y are smaller than Z. Or X is smaller than Y and Y is larger than Z.
4. Measure: Use these measurements gathered from teaching materials at LAVC to calculate the condylar index and the facial index. All measurements are in millimeters

	A. africanus	Human (euro male)	H. habilis (KNM ER 1813	H. erectus (WT 15000)	H. heidlebergensis (Atapuerca 5)	H. neanderthalensis (La Ferrassie)
basion to opisthicranion	123	92	67	80	80	104
basion to prosthion	66	94	95	115	120	121
nasion to prosthion	71	70	71	80	81	89
basion to bregma	104	132	92	104	111	130

H. heidelbergensis added 5/26/21

Grading

Learning and growth take practice and reflection and I am here to support your efforts. All assignments will receive an initial grade based on the provided rubric. If you aren’t happy with the points you receive or need to improve your submission, everyone will have the option to review my feedback, revise your work, and resubmit your assignment by the “available until” date 1 week after the original due date. If you have questions about how to improve a submission or about my feedback, please ask me.