Where are the Ural Mountains?
Ural Mountains in Russia Ural Mountains in Central Asia The Ural Mountains run from north to south through Central Asia. They separate Europe from Asia. Like the Appalachian Mountains, the [...]
Ural Mountains in Russia Ural Mountains in Central Asia The Ural Mountains run from north to south through Central Asia. They separate Europe from Asia. Like the Appalachian Mountains, the [...]
Rocky Mountains The Rocky Mountains stretch all the way from the southern United States north into Canada. They through Utah, Colorado, Wyoming, Montana, and up into Alberta. What we call [...]
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 [...]
Dragonfly When was the Carboniferous period? With the end of the Devonian period about 359 million years ago, the Carboniferous period got started. More about the Devonian Quick summary of [...]
Tobacco plants growing put carbon dioxide molecules back into the air - like all plants What is carbon dioxide made of? Carbon dioxide is one of the simplest and commonest [...]
History of coal: These are lumps of coal What is coal made of? Most of the coal on Earth formed during the Carboniferous Period about 350 million years ago, when [...]
Pine trees - A Spruce tree is a type of gymnosperm and conifer Too dry for ferns and moss Near the end of the Carboniferous period, about 300 million years [...]
What are ferns? Ferns growing in a forest When did ferns evolve? The first ferns - the first plants that had leaves - evolved from plants that were more like [...]
Cycad trees. They look like palm trees but they are very different! At the end of the Carboniferous period, about 300 million years ago, the only kinds of plants on [...]
Evolution of mollusks: Slugs are a kind of mollusk. When did the first mollusks appear? Mollusks are animals like mussels, clams, snails and slugs. Their name means "soft", because mollusks don't have [...]