C. Atmosphere - which is the one sphere that means "air" or "gasses". The other ones mean, Biosphere = "living", Lithosphere = "land", and Hydrosphere = "water"
which language r u ask in??
Answer:
True
Explanation:
The primary reason magma forms at subduction zones is that the subducting plate carries a cover of sediments, water, and hydrated minerals down with it, which lowers the temperature required for the adjacent overlying mantle lithospheric rock to melt.True
Subduction is a geological process that takes place at convergent boundaries of tectonic plates,this zones are the second most important environment on Earth for volcanic eruptions
Magma is produced in the subduction zone as a result of the subducting plate carrying a cover of sediments, water, and hydrated minerals down with it, which lowers the temperature required for the adjacent overlying mantle lithospheric rock to melt. Due to the heat caused by it rubbing against the other plate as well as the natural heat of the mantle in the earth crust, the plate melts and turns into magma, also the melting of peridotite in the presence of water results in the generation of magma,this addition of fluids lowers the melting point of the mantle.
magmas in subduction zone volcanoes are often explosive, because they arrive at the surface as very sticky and gas rich
The main motivation of the European colonial powers to colonize Africa was the economic interest, or to put it more specifically, exploiting the natural resources, cheap and abundant labor force, and making wealth out of it.
Africa is a continent that is very rich in natural resources. Lot of those natural resources were very expansive, in high demand, and highly appreciated outside of Africa. The Europeans saw a great opportunity to make themselves even more wealthy, as they had far superior military and weapons, so conquering would not be a problem, and the natives were not using those natural resources nor knew that they are valuable in other places of the world.
The Europeans used the suitable circumstances, and numerous colonial European countries managed to get a piece of the African land, making lot of wealth out if it until the end of the colonial period.
