Answer:
Option (C)
Explanation:
The mid-oceanic ridges are the submarine mountains that are formed in a divergent plate boundary. In this region, the oceanic crust gradually rises due to the movement of the magma towards the surface. This movement of magma upward is due to the formation of convection current in the mantle, where these currents are generated because of the heat energy provided from the interior of the earth.
These are the region, where the temperature is extremely high and the rocks are in the form of liquid (magma) and hot rocks are less denser than the cold rocks, so they move upward. This motion of magma upward and erupting on the seafloor leads to the uprising of the oceanic crust.
Thus, the correct answer is option (C).
Answer:
None of the above
Explanation:
The Bowen reaction series provides an insight to what happens to a crystallizing magma as it cools. There are two arms in the series, the continuous and the discontinuous series. The continuous series is made of the plagioclase feldspar. At high temperature, calcic plagioclase are crystallized out of the melt and at lower temperature, sodic plagioclase begins to from.
The discontinuous series consists of the trend through which other minerals are crystallized. At high temperature, olivine first forms and quartz is the last to crystallized out.
For a given melt, according to the Bowen's reaction series, the composition becomes more felsic at low temperatures. The silica content increases considerably.
The series is designed for silicate minerals found in nature and not sulfate minerals. The continuous series is for plagioclase feldspars not amphibole. Amphibole is in the discontinuous series.
The correct matches are as follows:
<span>1. It contains large amounts of frozen water
</span><span>C. Europa
</span><span>
2. The temperature of its atmosphere is increased by high levels of carbon dioxide
</span><span>B. Venus
</span><span>
3. It doesn't have enough gravity to have an atmosphere
</span><span>A. Earth's moon
</span><span>
4. Astronomers believe there is a good chance it contains liquid water
</span>D. Mars
Hope this answers the question. Have a nice day.
