plate tectonics

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21 09, 2017

What is plate tectonics? Earthquakes and volcanoes

By |2019-08-16T08:59:53-07:00September 21st, 2017|Geology|0 Comments

Plate tectonics: The world as seen from space (flattened out) The continents move around When you look at a map of the world, it seems as though it was always like that - North America on top of South America, Europe north of Africa, Australia off at the bottom right. But really all of the dry land on Earth moves [...]

18 08, 2017

Earthquakes and algae – the planet Earth

By |2019-05-22T14:05:38-07:00August 18th, 2017|Physics|0 Comments

Molten lava: the beginnings of planet Earth What is the Earth made of? Most of the molecules that smashed together to make the Earth were iron. The smashing together released a lot of heat, so the whole center of the planet Earth is made of hot melted iron. How old is the Earth? What is [...]

26 06, 2017

What causes volcanoes? Geology

By |2018-04-21T11:56:42-07:00June 26th, 2017|Geology|0 Comments

Volcano erupting Volcanoes are places where the plates of the Earth's surface have cracks in them, so that the very hot melted rocks that are under the tectonic plates bubble up to the surface. We call the hot melted rocks magma. The magma is under a lot of pressure inside the Earth's plates, [...]

25 06, 2017

Where are the Ural Mountains?

By |2019-09-15T07:03:36-07:00June 25th, 2017|Central Asia|4 Comments

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 Urals formed about 300 million years ago. That was near the end of the Carboniferous period, when the first reptiles were evolving. It [...]

25 06, 2017

Where are the Rocky Mountains?

By |2018-04-21T11:56:41-07:00June 25th, 2017|Geology, North America|0 Comments

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 Rocky Mountains is really three different mountain chains, one on top of the other. The oldest mountain chain started more than a [...]

25 06, 2017

Where are the Himalaya Mountains? India

By |2019-08-14T11:50:48-07:00June 25th, 2017|China, Geology, India|0 Comments

Himalaya Mountains India breaks off of Africa About 55 million years ago, plate tectonics made the land that is now India break off from what is now Africa. At this time, the first modern mammals like rats and guinea pigs were evolving, and most of the Earth was covered in forests. The Tertiary [...]

25 06, 2017

Where are the Alps? Mountains in Europe

By |2019-01-23T09:52:38-07:00June 25th, 2017|Geology, Northern Europe|0 Comments

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, and Italy is on the other side. More about Northern Europe Which mountains are the highest? When did the Alps form? The Alps [...]

24 06, 2017

Permian period – Reptiles and pine trees

By |2019-09-20T12:28:14-07:00June 24th, 2017|Geology|0 Comments

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 Pangaea, which reached all the way from the North Pole to the South Pole. With all the land grouped together, the climate got [...]

24 06, 2017

Geological eras: a quick summary

By |2019-07-03T15:46:11-07:00June 24th, 2017|Geology, History|0 Comments

Geological eras: Fossil spider from the Cretaceous era Why do we have geological eras? Geologists divide the history of the Earth into eons and eras. That's so they don't have to always be saying "400 million years ago" or whatever. Not everyone uses the same names for the eras, so you may find [...]

24 06, 2017

What happened in the Cretaceous Period?

By |2019-04-29T06:34:15-07:00June 24th, 2017|Geology|0 Comments

Volcano erupting When was the Cretaceous period? During the Cretaceous period, beginning about 145 million years ago, the continents continued to drift away from each other. Plate tectonics Back to the Jurassic Summary of geological eras All our geology articles What happened during the Cretaceous? Because the continents were separated, mammals, birds, and [...]