Answer:
Partial melting occurs when only a portion of solid is melted. It is thus enriched in the chemical components of minerals with lower melting temperatures and the remaining unmelted portion of the rock is composed of minerals with highest melting temperatures. Partial melting preferentially enriches melts with incompatible elements.
Partially melted rock do not usually experience complete melting inside the Earth, due to their different chemical composition and their melting points.
It is thought that partial-melting processes play a major role in generating more-defined liquids from less-evolved ones, so that many basalts may be the result of partial melting in the upper mantle, and many granites may have derived partly or completely from the partial melting of continental crust (anatexis).With increasing temperature and pressure, the subducted oceanic crust (of basic composition) first undergoes metamorphism and then begins to melt or release watery fluids; this material rises into the overlying mantle, which may also begin to melt, giving rise to intermediate magma.
Scientists believe that increased pollution may cause global warming because pollution includes greenhouse gases, which trap heat in the Earth’s atmosphere.
Option B
<u>Explanation</u>:
When the average temperature of earth increases and rises continuously above the normal value for a long period of time the it is referred as global warming.
Human beings are major cause in increasing pollution by various means whether its chemical industrial metallic or any other type of pollution. The major contributing factor in aiding pollution is the smoke from factories or vehicles which increases the carbon dioxide level above normal and when these gases rises they are trapped inside the earth surface and produce a green house effect. This is the main reason that scientists think aboutglobal warming.
A. Add up individuals who came into the area because of reproduction or immigration
One important influence is climate ie many Canadians, especially from the cold Prairies like to move to Vancouver, BC because the climate is so much milder in the winter due to the proximity of the Pacific Ocean. Another important influence is topography, so that if a country is mostly mountainous, the cost of road building will be more expensive than on, say the prairies or on the coastal desert of Peru and northern Chile. Another important influence of geography is the presence of fertile soil such as in El Salvador from the ash of the volcanoes to grow coffee in, or the fertile floodplain of the Nile River in Egypt.
Answer:
Cruciform
Option: Explanation:
The Old St. Peter's Church erected by Emperor Constantine I in the 4th century. Pope Julius II ordered to build a new basilica because the ancient church was beyond repair. Old St. Peter's Church was in a classic Roman style with a rectangular-shaped building. The church had a cruciform in its whole construct building with an astonishing number of Solomonic columns.
