Answer:
Basaltic magma -- SiO2 45-55 wt%, high in Fe, Mg, Ca, low in K, Na
Andesitic magma -- SiO2 55-65 wt%, intermediate. in Fe, Mg, Ca, Na, K
Rhyolitic magma -- SiO2 65-75%, low in Fe, Mg, Ca, high in K, Na
Explanation:
Answer:
North american and Eurasian plates
Explanation:
Iceland has a divergent boundary formed by the above two plates and it sits on the Hotspot and a mantle plume as since iits between the Mid Atlantic ridges believed to be contributed in dispersal of continents across the ocean.
<span>It's is the second one. The waste materials generated by one organism are often reused by other organisms.Mass, or matter, is conserved in all physical and chemical changes. Matter is not created or destroyed within ecosystems, it only undergoes physical or chemical changes. One example of this process is that the waste materials generated by one organism are often reused by other organisms as food or nutrients.</span>
Answer:
Divergent boundaries such as the mid-oceanic ridge system.
Explanation:
Divergent boundaries occur when plate boundaries pull away from each other. Molten rock or magma rise from the gap between the two plates, rising up to the sea floor where it cools down to form new crust. It is the mid-ocean ridges where you see the most magma produced and there has not been any other tectonic event or area that could match its procution since the Precambrian period.
Answer:
Vatican
Explanation:
Vatican is the smallest country in Europe by population, but also by area, and not just in Europe, but it is the smallest country by population and area in the whole world. The country occupies only 44 hectares, and it has less then 800 inhabitants. It is also the only country in the world that has a birth rate of 0. The inhabitants of this country are the highest representatives of the Catholic Church, thus the Pope and the cardinals, and the people that work there. This miniature country is located in the central part of Rome, thus it has a border with only one country, Italy. It is a remnant of the Papal city-state that existed in this region, though it is much smaller nowadays. Vatican is the second most holy place for the 1.3 billion Catholics, right behind Jerusalem, and millions of people are visiting this small country every year, some because of religious purposes, while some as tourists.
