B cuz they can appear at any time
Answer:
El espacio es algo extraño. El espacio se considera todo fuera de la atmósfera de un planeta y / o estrella. así que, básicamente, la mayoría de lo que constituye el universo es el ESPACIO entre las cosas. De ahí el nombre del espacio.
Answer:
Options (1), (3), (4) and (5)
Explanation:
The deep ocean water refers to the water that is present at the bottom of the ocean. This deep water is highly dense, and are rich in essential nutrients including oxygen. Sunlight cannot penetrate into the deeper layer, as a result of which these water remains much colder and moves at a much slower rate in comparison to the surface waves. These deep ocean currents are generated by the density differences due to two factors namely, temperature and salinity.
These currents are moved from the equatorial region to the poles and again comes back from the poles to the equator, forming a circular pattern. This circulation of water is responsible for the various climatic conditions that occur at different places.
Thus, the correct answers are mentioned above.
Answer:
The crust size remains constant because the older crust is melted at subduction zones.
Explanation:
The crust is constnatly created on Earth, but the crust is constantly getting destroyed as well. This situation leads to the total size of the crust being roughly at the same level, or rather constant, as one side a new one emerges, while at the same time, on the other side it gets destroyed.
The vast majority of the new crust is formed where there are divergent plate boundaries. Here, a gap opens up between the plates that move away and magma is constantly rising to the surface and creates new crust. When it comes to the destruction of crust, it occurs at subduction zones. Here, one plate moves below another plate, and as it does it reaches the upper mantle where it gets melted and recycled because of the high temperatures and pressure.
