Answer:
b. more felsic
Explanation:
The sequnce of crsytallization of magma as , first is the ultramafic which is at at very high temperature , then is mafic at intermediate temperature , and felsic at lowest lowest temperature , at the final stage .
Hence , the composition of earth beneath the surface is like mafic while the surface has felsic .
When the crystallizing magma is assimilated or contaminated with the crystal rock and then the magma enhances the light color or the felsic minerals added into magma due to the assimilation of the crystal rocks .
Therefore , the magma increases the felsic nature via assimilation .
Now , When a rock undergoes partial melting , then low temperature or light color minerals released first into melts and hence , becomes more felsic .
Answer:
Option (C)
Explanation:
Table Mountains are generally considered to be one of the oldest mountains that are present on earth. They are nearly six times older than the Himalayas. It started to form about 800 million years back when the rock sandstone were created under the the surface of the water. These rocks were uplifted due to the upward thrust produced by the magma, as a result of which it slowly started to form volcanoes. Over the years, the earth has experienced much cooler temperature due to the occurrence of ice age events, due to which these rocks were crystallized forming intrusive igneous rock such as granite. This uplifted mountains and volcanoes were covered with ice and over a due course of time, because of the overlying weight, the mountains became flat and all of the ice were melt, thereby forming the table mountains.
Thus, it can be considered that the table mountains are formed after all of the glaciers are melt.
Hence, the correct answer is option (C).
Above the Main Sequence and above the Red Giants<span>/Giants, are scattered a few stars of highest luminosities and any (from high to low) surface temperatures</span>
Answer:
The correct option is:
1) It was warmer than it is today
Explanation:
Caboniferous period lasted from around 360 to 300 million years ago. The term Carboniferous means rich deposits of coal. The deposits of coals occured in different region of Europe, Asia and Africa, including South China. In the start of the period, the average temperate was 20°C° which was dropped to 12° in the middle of the period. This cooling and drying resulted in Carboniferous rainforest. Hence, the temperature was warmer than it is today.
Frost wedging among the following choices given in the question is as a result of a change in pressure. The correct option among all the options given in the question is the first option or option "A". When the cracks of rock layers containing water freezes during the night, this causes the pressure within the cracks to increase causing frost wedging.
