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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ages American Museum amphibians ancestors animals appeared became become began beginning birds bottom called carried cells clouds coal Coast cold continued course covered crack Cretaceous crust deep descendants developed dinosaurs disappeared early earth Eocene Europe feet Figure Finally fishes flowed forests formed fossil giant glacier grew ground grow happened hard hills horse huge hundred kind Lake land larger lava layer leaves lived looked mammals melted miles million Miocene mountains move Museum of Natural Natural History North America ocean Oligocene once particles perhaps Period picture plains plants Pleistocene present primates probably rain remember reptiles rise rivers rock rose salt shallow sides skin slowly sometimes streams things thousands took trees Triassic turned valley volcanoes warm wrinkles