Igneous Rocks

How do igneous rocks form?

What are the three types of igneous rock?

What is the difference between magma and lava?

What are extrusive and intrusive igneous rocks?

How does crystal size relate to cooling rate?

How does this relate to extrusive vs intrusive?

What are the four compositional categories of magmas/igneous rocks we discussed?

What is Bowen’s reaction series?

How do silica content, amount of dissolved volatiles, and temperature each effect magma viscosity?

What do the terms ‘mafic’ and ‘felsic’ mean?

What are the processes that can cause the chemical composition of a magma to evolve?

How does the composition evolve in each case (does it become more mafic or more felsic)?

What are the mechanisms by which deep rocks melt to produce magma?

What is a volcano?

What are the three types of igneous rock?

What are the different grain size/texture terms for describing crystalline igneous rocks?