What is the main mineral type the continental plates are made out of? i've looked on the internet and can't find it! can you tell me? with website links to? and give 3 facts about this material. also, what mineral type are the oceanic plates made out of? give 3 facts about this mineral. and you! if you answer both you get best answer!

Reading graphs: unemployment us unemployment rate (1961-2011) identify the trends in the graph and then use the drop- down menu to complete each statement from 1961 to 1965 unemployment was in the mid-2000s through 2011. unemployment was percentage unemployed 1961 1971 1981 1991 2001 2011 year

Aletsch glacier is the largest glacier in switzerland and the largest found in the alps, a mountain range which extends from monaco in the east to slovenia in the west. currently, the aletsch glacier is retreating. under what circumstances would this glacier see growth instead of retreat? a decline in plate tectonics across the mountain range annual snowfall that exceeds yearly losses an increase in ablation in the southern valleys a rise in temperatures to that of a mediterranean climate

If scientists only detect p waves in a certain layer of earths interior what does that tell us?