a thick subsurface layer of soil that remains frozen throughout the year, occurring chiefly in polar regions.
<u>Answer:</u>
Crystal structure is a way how atoms or molecules are arranged and in what manner to form a Crystal and this arrangement helps to differentiate one crystal from the other.
Using a crystal structure we can tell that crystal of pyrite is cubic and crystal of gypsum is mono-clinic which helps to tell us that both the crystals are separate from one another because of the arrangement of the molecules and atoms in both.
Answer:
Explanation:
As you go deeper in the Earth both temperature and pressure increases. Although the inner core is very hot, it is solid because it is experiencing very high pressure.
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