Extrusive igneous rocks cool rapidly above Earth's surface. What type of crystals do they contain?​

What is the approximate chemical composition of the solar nebula?

What must happen for new french words to be published in official dictionaries? a. they must be approved by the french academy b. they must be voted on by the people of france c. they must be used by famous french writers d. they must be used by philosophers a. they must be approved by the french academy

The chemical or mechanical process by which rock is gradually broken down eventually becoming soil