The Earth for SamHistory of the earth from the earliest days to the time when man began to make records. Grades 5-8. |
Contents
When the Earth Was Hot | 3 |
The Air We Breathe | 9 |
Seaweed and Jellyfish | 13 |
Copyright | |
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ago and lasted American Museum amphibians ancestors animals appeared Archaeopteryx became began birds Bothriolepis bottom C. R. Knight called canyon Carboniferous Carboniferous Period chlorophyll clouds CO₂ coal Coast cold crack creodonts Cretaceous Cretaceous Period Cro-Magnon crust descendants developed Devonian dinosaurs earth Eocene Europe fauna feet Figure fishes flowed forests formed fossil giant glacier Greenland grew groups of cells horse huge ichthyosaurs inland seas insects Lake lava little particles mammals meat eaters melted rock million years ago Miocene mosasaurs Museum of Natural North America ocean Oligocene outer layer painting by C. R. peat bogs perhaps Permian Permian Period picture plants Pleistocene primates probably rain reptiles rivers rose salt scorpions seaweed sequoia shallow seas shellfish Sierra Nevada Silurian Silurian Period skin slowly Smilodon sometimes starfish streams thousands tiny trees Triassic Period Tyrannosaurus rex valley volcanoes warm wrinkles