Answer: The different layers are a result of lighter parts (such as the continental crust) settling at the surface level and heavier parts (such as iron and nickel in the core) settling in the middle. The layers separate by density, otherwise known as compositional layering. The earth did not always have these layers, as it had to undergo cooling to form some of them (like the continental crust).
The answer is c. Vibrates on one spot
It may be 166, but you may want to check my math
Include grand parents.
Nuclear family is a family group with 2 parents and their children. This is a type of family structure. It typically centered on married couple. This is in contrast to other family group such as single parent, extended types. Extended family extends beyond the nuclear family usually extended by grand parents. Usually they live under one roof. Certain family structure has advantages and disadvantages. This is also affected by the culture and way of living of the family.
