Final answer:
Arithmetic population density is the total number of people divided by the total land area, while physiological population density is the number of people per unit area of arable land.
Step-by-step explanation:
The differences between Arithmetic, Agriculture, and Physiologic population density are key concepts in understanding population metrics.
Arithmetic population density refers to the total number of people divided by the total land area. This gives an average density of the entire area without considering the variability of land suitability for supporting human life. It is a measure of the average number of people living in a specific area. This type of population density does not take into account the availability of arable land or resources.
Physiological population density, on the other hand, is the number of people per unit of area of arable land, which is land suitable for agriculture. This measure provides a more accurate representation of the actual pressure that the human population exerts on the land that can support life, especially in terms of agricultural productivity. It takes into account both the total population and the availability of arable land. This type of population density provides a measure of the pressure on the available arable land and the potential for agriculture.
Lastly, Arithmetic growth is a term that refers to population growth where the population increases by the same amount over each time interval, which is different from these population densities but related to the broader topic of how populations change over time.