Test 2: Volcanoes

what are the 2 major dissolved gasses in magmas?

H2O, CO2(carbon dioxide)

what are volcanic bombs?

blobs of unsolidified lave that fly through the air and harden upon contact

what are plyroclastics material ?

fire and rock fragments that fly out of volcanoes

what makes an eruption violent?

the composition, temp, gasses

compostion of feltic ryoltic lavas and what type of volcanoe does it come from?

have more gas, cooler, more viscous, cinder cone volcanoes

compostion of mafic basaltic lavas and what type of valcanoe does it come from?

hotter, thinner, less gas, shield volcano

what are characteristics of cinder cone volcanoes?

steep slopes, very tall, pyroclastic

what are characteristics of shield volcanoes?

shallow slopes, take up large area

what makes a magma body more explosive?

very viscous and gassy