Geological eras: a quick summary
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 [...]
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06, 2017
24
06, 2017
Hadean Eon – Earth, Moon, proteins, RNA
In the Hadean Eon, Earth was covered with active volcanoes like this one. Why is it called the Hadean Eon? Scientists named the Hadean Eon after the Greek god Hades, [...]
23
06, 2017
Carboniferous Period – Geology
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 [...]
23
06, 2017
What happened in the Archaean Eon?
Archaean Eon: A volcano erupts out of the water The beginning of the Archaean Eon After the end of the Hadean Eon is the beginning of the Archaean Eon. That's about [...]
23
06, 2017
Earthquakes, tsunamis, and the Richter scale
Earthquake in Peru - Earthquakes can split the ground open! What causes earthquakes? What causes earthquakes? Earthquakes happen when the moving tectonic plates that make up the surface of the Earth [...]
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06, 2017
Clay, sand, and loam – Soil types
Soil types triangle What is dirt made of? All dirt is basically made of three different kinds of particles, as Aristotle and his student Theophrastus saw in the 300s BC. [...]
25
05, 2017
What is kaolin clay? History of Art
A chunk of kaolin clay Kaolin clay and porcelain Kaolin is a kind of clay with a lot of aluminum, silica, and oxygen in it. It is the kind of [...]
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05, 2017
History of clay – History of Art
History of clay: Clay on a potter's wheel What is clay? Clay is very fine particles of dirt which float in a stream or river and then sink to the [...]
24
05, 2017
What is basalt? Geology and Grindstones
A Roman road paved in basalt (This is from Trajan's Market in Rome) Basalt and volcanoes Basalt (bu-SALT) is a volcanic stone - it forms from the lava that volcanoes [...]
