Answer:
population pyramids
Explanation:
Population pyramids show the structure of a population by comparing relative numbers of people in different age groups.
Population structures differ markedly between Less Economically Developed Countries LEDCs and More Economically Developed Countries MEDCs.
The shape of a population pyramid can tell us a lot about an area's population.
Usually pyramids are drawn with the percentage of male population on the left and percentage of female population on the right.
It gives us information about birth and death rates as well as life expectancy.
Everything in Earth's<span> system can be placed into one of </span>four major<span> subsystems: land, water, living things, or air. These </span>four<span> subsystems are called "</span>spheres<span>." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).</span>
Answer:
C. supply and demand
Explanation:
<u>In the system of the market economy, the decisions about economic processes are based on the of the people (how much they need and buy something) and the needs of the supply (needs for natural resources, goods, and things which can be bought). </u>
A market economy also means the pricing of the goods is based on the demand for them. If products are not in demand and bought by the customers, it’s the price and supply goes down. Once the demand for the product grows, the profit is made.
The final goal is the price which is <u>equilibrium</u>, meaning goods are supplied exactly by the demand and with the fixed price that makes the process possible. This equilibrium should also provide the profit for the supplier.
D. high and low levels of silica in the different type of lava.
Explanation:
The volcanoes have different types of explosions. Some tend to be highly explosive, some less explosive, some don't have explosions at all, while some have combinations of different eruptions. The reason for this diversity in the eruption types is mostly the composition of the magma, or rather how high is the silica content in it.
Basically, the higher the silica level in the magma the higher the explosiveness, and the lower the silica level the lower the chances of explosiveness. This is the case because the higher amount of silica makes the magma thicker, so the gasses are trapped and they explode, while when the lower silica content makes the magma less thick, so the gasses are not trapped and explosions are lacking.
Answer: Machu Picchu is located In the Andes Mountain range in Peru.
