The Earth for SamHistory of the earth from the earliest days to the time when man began to make records. Grades 5-8. |
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Page 58
... salt water and letting it stand for a few days . It will evaporate , and you will find all the salt that you had dissolved in the water left on the dish in the form of a very thin coating . If , without removing the salt , you fill the ...
... salt water and letting it stand for a few days . It will evaporate , and you will find all the salt that you had dissolved in the water left on the dish in the form of a very thin coating . If , without removing the salt , you fill the ...
Page 59
... salts are carried into the ocean , and there they stay forever . This is because the ocean behaves like the salt water in that dish . When the sun evaporates the water of the ocean and forms clouds , the salt is left behind . Then the ...
... salts are carried into the ocean , and there they stay forever . This is because the ocean behaves like the salt water in that dish . When the sun evaporates the water of the ocean and forms clouds , the salt is left behind . Then the ...
Page 109
... salt the greatest mass of salt that has ever been discovered in the earth . The next greatest salt beds are in Germany . In some places these beds are three thousand feet thick . Some beds of salt have been mined for hundreds of years ...
... salt the greatest mass of salt that has ever been discovered in the earth . The next greatest salt beds are in Germany . In some places these beds are three thousand feet thick . Some beds of salt have been mined for hundreds of years ...
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