Which mountains are the highest?
Up in the Alps in Switzerland Which mountains are the highest in the world? Practice graphing and see how much higher some mountain chains are than others. The highest peaks [...]
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06, 2017
25
06, 2017
Where are the Appalachian mountains?
The Appalachian Mountains When did the Appalachian Mountains form? About 300 million years ago, near the end of the Carboniferous period, when the first reptiles were evolving, the tectonic plates [...]
25
06, 2017
Where are the Alps? Mountains in Europe
The Alps Where are the Alps? The Alps are a long row of mountains dividing southern Europe from northern Europe. France and Germany are on one side of the Alps, [...]
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06, 2017
Triassic period – pine trees and pterodactyls
A turtle in the desert During the Triassic period (about 248 to 199 million years ago), most of Earth's land continued to stick together in one big supercontinent, Pangaea. Because [...]
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06, 2017
Tertiary period – mammals and mountains
Tertiary period: Large animals evolved like moose Dinosaurs become extinct The Tertiary period begins with the catastrophe that killed off the dinosaurs at the end of the Cretaceous Period, about 65 [...]
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06, 2017
Silurian period – Fish get jaws
Silurian period: Trout swimming When was the Silurian period? The beginning of the Silurian period was about 443 million years ago. Some environmental problem at the end of the Ordovician [...]
24
06, 2017
Quaternary period – modern times
The Quaternary Period includes today - big cities and all When was the Quaternary Period? The Quaternary period began about 1.8 million years ago (1,800,000 years ago), coming after the [...]
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06, 2017
Proterozoic Eon – eukaryotes to worms
Two and a half billion years ago, the Archaean Eon ended and the Proterozoic Eon began. Trillions of prokaryote cells lived in Earth's oceans. Some of these cells could photosynthesize their energy [...]
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06, 2017
Permian period – Reptiles and pine trees
Crocodiles About 290 million years ago, the Carboniferous period ended and the Permian period began. Almost all of the land on Earth grouped together in one big supercontinent we call [...]
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06, 2017
Jurassic Period – dinosaurs and ferns
A dinosaur skeleton from the Jurassic period How the Jurassic period began When the Jurassic period began, about 199 million years ago, a lot of animals had just become extinct [...]
