More Tell Me why: Answers to Over 400 Questions Children Ask Most OftenA general reference work with answers to over 400 questions about general science and natural history. |
Contents
Chapter | 9 |
How does the spectrum inform | 15 |
How old is the earth? | 21 |
Copyright | |
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Common terms and phrases
actually ancient ancient Egypt animals armadillo bacteria became began begin believed birds blood cells body bones brain bread caffein called carbon carbon dioxide catfish cause century chemical coal tar coffee color copper cotton creatures cuttlefish dandy horse developed diamond disease earth eggs Egyptians England Europe example extra-sensory perception eyes fact feet fibers fish germs glands glass Greeks grow hair hay fever heat horse inches infection invented isinglass kind known legs lemurs liquid live marble marsupials material means Middle Ages miles milk modern molecules mollusks move muscles ocean organs peanuts person phosphorus pipes plants poison polio pounds probably produce protoplasm rock Romans salt seeds shell skin slide rule soap sometimes sound species stone substance sugar surface tapeworm teeth temperature things thousands tiny tissue tree United usually wood word