What is granite? Igneous rock
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 [...]
25
06, 2017
25
06, 2017
Feldspar rock – a kind of igneous rock
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 [...]
2
06, 2017
What is silicon? Atoms, elements, chemistry
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 [...]
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 [...]
