Respuesta :
Answer 2:
C. Aesthenosphere
Explanation:
Convection currents within the magma drive plate tectonics. Heat produced through the radioactive decomposition of elements buried in the interior of the Earth results in magma (molten rock) in the aesthenosphere. The aesthenosphere (70km to 250 km) is the mantle's part, the central sphere of the Earth that stretches up to 2900 km.
Answer 3:
D. High Pressure
Explanation:
Despite the fact that the earth's inner core is evolving into liquid, it still remains solid, because of the very high pressure which keeps it compacted collectively even if the temperature is notably high. It was also suggested that Earth's inner core might turn into a unique crystal of iron.
Answer 4:
C. Variations in temperatures inside Earth forces the plates to move
Explanation:
The Plates at the earth's surface tend to move due to the excessive heat in the Earth’s core which results in molten rock in the mantle layer to come into motion. It moves in a form known as convection cell that develops when hot material rises, cools, and finally sinks down. As the cooled matter sinks down, it is heated and consequently rises again.
Answer 5:
Mantle (about 2900 km)
Explanation:
Both the earth and an egg have a thin, crisp shell. The crust of the earth can be broken into bits, just like the cracked eggshell of a hardboiled egg. The mantle of the planet is analogous to the egg white, and the core of it is found in the center, like the egg yolk. Egg shell is considered as an example for crust, egg white for mantle and egg yolk for core.
Mantle is nearly 2,900 km thick forming the layer of the earth after crust and before core.
Answer 6:
The earth's core is solid because of the high pressure upon it. Experts theorize that the extremely high temperature of the solid inner core is retaining the outer core in a semi-liquid form which allows the inner core to rotate at a slightly changed rate than the rest of the layers. This results in magnetic poles which redirect damaging cosmic rays from striking with earth. The study is the result of measurements through volcanic activity and sound waves.
Evidence:
Scientists study regarding the layers of earth deep inside the crust by examining how seismic waves propagate through the Earth. In case of earthquake somewhere, seismographs at many positions will record it.
If an earthquake occurs, locations far away from the occurrence notice the S and P waves propagation through deeper layers. Through measuring the arrival time of the waves, the velocity of the waves can be taken for a function of depth.
Furthermore, to know regarding the layers of the planet sound waves are transmitted through the earth. Due to the difference of densities between layers the waves will travel through them differently, we can comprehend that the sound waves are means to understand the layers of the earth.