Can you help with my homework please?

1) The Siera Nevada mountains in California are intrusive rocks several hundred km long and over 100 km wide. The intrusion of numerous large plutons such as these has created a body called a:


a) plutonium


b) sill


c) dike


d) batholith





2)Rock made by freezing of magma underground, after it has pushed its way into preexisting crustal rock is called:


a) lava rock


b) volcanic rock


c) magmamatic rock


d) extrusive rock


e) intrusive rock





3)For fractional crystallization to proceed in a crystallizing magma, it is necessary that the growing crystals somehow separate from the remaining liquid.


In your own words, describe at least one way in which this separation could occur.|||1. D - a batholith is a large pluton exposed to the surface... if i remember it correctly. And besides, by means of elimination, we can conclude it's D. Plutonium is not a feature of the Earth, it's an element. Sill and dikes are all underground features, so the answer should be D.





2. E - any igneous rock formed beneath the earth's surface is an intrusive igneous rock.





3. Differences in density can cause the crystallized minerals to separate from the remaining liquid.|||1) A


2) D|||1 isn't a, because plutonium is an element not a geologic process. the answer to 1 is most likely d, as batholiths are intrusions which contain plutons.





2. E as rock that cools below the surface is an igneous intrusive rock





3. fractional crystallization is when minerals start to crystallize at different temperatures. as different minerals have different melting points, so as the temperature starts to drop as the melt reaches the surface, certain minerals will crystallize while others won't


(im not sure if this is what you're being asked for 3, but if it is change it to your own words)