Answer:
Explanation:Destruction of natural vegetation is primarily caused by deforestation. Other major causes are wildfire and over-exploitation. Deforestation not only occurs as a result of firewood extraction by the local population but also as a result of the creation of arable as well as pastoral land.
Answer:1. Yes, there are magma of different composition in existence. silicate mineral become molten at the same temperature of 1200 degree centigrade in igneous rock formation and this does not stop the composition of magma which are of three types basalic, andesitic and rhyolitic each of them have different composition ranging between iron, magnesium and calcium.
2. Partial melting is the reason why we have different forms of rock, this is because the mantle is composed of different minerals, these minerals doesn't melt uniformly, a mineral with low melting point will turn to liquid while the one with high melting point will turn to solid crystals. As the magma melts and flow slowly before it cools into solid rock it undergoes some physical and chemical changes which causes differences in the rock formed.
3. The last question depends on ever individual's location, where i am i can easily go and see granite at a mining site that deals with construction rocks which is an example of igneous rock.
Jupiter and Saturn are the 2 biggest planets in our solar system but there are millions on planets that are bigger.
Answer:
I believe it's C.
Explanation:
The mantle underneath the plates moves in a circular way (Convection Currents). That is why plates move.
More rarely, Ocean trenches can be formed when two plates carrying oceanic crust meet.The Mariana Trench,in the South Pacific Ocean,is formed as the mighty Pacific plate subducts beneath the smaller ,less dense Philippine plate.
