quartz

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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, [...]

26 06, 2017

What is quartz? Igneous rock

By |2018-09-06T07:27:12-07:00June 26th, 2017|Geology|0 Comments

What is quartz? A chunk of white quartz What is quartz made of? Quartz is an igneous rock made out of molecules of silicon and oxygen atoms held together in a crystal pattern. All of the silica and oxygen that make quartz came originally from the insides of stars, and it shot out [...]

26 06, 2017

What are igneous rocks? Volcanic stone

By |2019-09-10T05:42:47-07:00June 26th, 2017|Geology|0 Comments

Igneous rocks: Obsidian tools What does "igneous" mean? Igneous means "fiery", and igneous rocks are rocks that were made by heating them up in a fire. Usually that fire is the big fire inside the earth, under the earth's crust. The first scientist who identified this kind of rock was ibn Sina. He [...]

25 06, 2017

What is granite? Igneous rock

By |2019-07-15T09:46:19-07:00June 25th, 2017|Geology|0 Comments

Granite rock What is granite? Granite forms when bits of quartz and feldspar shoot out of volcanoes, so it's one kind of igneous rock. What is quartz? Where does feldspar come from? More about igneous rock All our geology articles Why is the rock called "granite"? Granite stairs on the Queens borough [...]

25 06, 2017

Feldspar rock – a kind of igneous rock

By |2019-06-07T19:17:22-07:00June 25th, 2017|Geology|0 Comments

A feldspar rock quarry in India Is feldspar rare? Feldspar is a very common igneous rock. More than half of the Earth's crust is made of feldspar. What are igneous rocks? All our geology articles What is feldspar made of? When molecules of aluminum, silica and oxygen get together with potassium, they combine [...]

24 06, 2017

Hadean Eon – Earth, Moon, proteins, RNA

By |2019-07-31T13:18:23-07:00June 24th, 2017|Geology|4 Comments

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, who ruled the underworld. That's because during most of the Hadean period the surface of the Earth must have been like the Christian [...]

2 06, 2017

What is silicon? Atoms, elements, chemistry

By |2018-04-24T14:46:23-07:00June 2nd, 2017|Chemistry|0 Comments

Diagram of a silicon atom When a red giant star is getting older and runs out of helium fuel, it starts to convert the oxygen atoms in the star into silicon atoms. All silicon is made this way, inside a red giant star. Silicon is heavier than oxygen, because oxygen has only eight protons [...]