Oil reserves are the amount of technically and economically recoverable oil. Reserves may be for a well, for a reservoir, for a field, for a nation, or for the world. Different classifications of reserves are related to their degree of certainty.
The total estimated amount of oil in an oil reservoir, including both producible and non-producible oil, is called oil in place. However, because of reservoir characteristics and limitations in petroleum extraction technologies, only a fraction of this oil can be brought to the surface, and it is only this producible fraction that is considered to be reserves. The ratio of reserves to the total amount of oil in a particular reservoir is called the recovery factor. Determining a recovery factor for a given field depends on several features of the operation, including method of oil recovery used and technological developments.[1]
An expansive pyramid age-structure diagram best displays the age ranges in a country that is in stage 2 of the demographic transition.
Option d
<u>Explanation:</u>
The shift in demographics from high death rates and high birth rates in societies with lower education, technologies and economically under developed to demographics of low death or birth rates in societies with advanced technology, higher education and persistent economic development and includes the stages between both the scenarios stated is named as demographic transition.
This is to suggest or evaluate the growth rate cycles of the population of the country. There are 3 types of population pyramids namely,
Expansive population pyramids - shows the population that has the greater percentage in younger age groups. Most of the 3rd world nations fall in this category.
Constrictive population pyramids - shows declining birth rates
Stationary population pyramids - depicts equal proportion of population in all age categories.
They show that there was an ocean over the plains long ago, and fossils are always used to elaborate on the history of life/how it developed.
It is the bony ridge located above the eye socket of all primates
i don’t get why u did this but i’ll still answer