Answer:
1. Continental-continental convergence are both <em>continental crust</em> plates.
2. Buoyancy basically means these plates are light float on top of the Asthenosphere.
Explanation:
1. To go a little more into detail, this type of convergence ocurrs when two plates made of continental crust (not oceanic) collide. In the case of ocean-continent convergence, the denser oceanic crust sinks underneath the lighter continental crust.
In this scenario, we have two plates, neither of which want to sink, so instead of going down they just crumple and fold and keep colliding. This collision creates very high mountain ranges such as the Himalaya and usually doesn't contain any volcanic activity because no magma is capable of penetrating through so much crustal material.
2. As for why continental crust is buoyant and doesn't sink has much to do with its composition. Continental crust is made mostly of silicate material. This is very different from oceanic crust which is made of basaltic rocks and is therefore heavier. The term buoyancy refers to the 'floating action' of the continental crust on top of the uppermost mantle.
For humans, population density is the number of people per unit of area, usually quoted per square kilometer or square mile (which may include or exclude, for example, areas of water or glaciers). Commonly this may be calculated for a county, city, country, another territory or the entire world.
Granite<span>, </span>diorite<span>, </span>syenite<span>, </span>andesite<span>, and </span>rhyolite<span>. It is also found in metamorphic rocks such as </span>gneiss<span> and </span>schist<span>.</span>
Since they have been there for a long time, they have become coarsely!
Hope I helped! Just tell me if i'm wrong!
Answer:
The population pyramid is a graphical depiction of age and sex structure of population in a certain region ( usually state).
Explanation:
Pyramid is not the most adequate term since it`s two-dimensional and has a shape of a triangle. Left side of this triangle represents males and the right side females. This pyramid is presented with a set of bars which are pilled one on another. The bars are longer on the base and shorter on the top, hence the shape of a triangle. Each bar represents a certain age range. The lowest bar represents the range from 0 to 4 years. The one above from 5 to 9 years, the next from 10 to 14 years and so on. The length of a bar represents the number or the percentage of that range in the given population.
The pyramid population is regarded as one of the best ways to visualize age structure in both sexes.
