The Earth centered theory about the universe (geocentric theory) is the oldest one recorded. This theory suggested that the Earth is the largest object in the universe. It is the center of the universe, and all of the other objects, like the Sun, Moon, planets, stars, are orbiting around it.
The Sun centered theory about the universe (heliocentric theory) has been developed in the late Middle Ages. This theory suggested that the Sun is actually the center of the universe, not the Earth. That the Sun is the largest object in the universe, and the Earth, Moon, planets, stars, were all orbiting around the Sun.
In reality both of these theories are wrong, with the heliocentric theory being closer to the reality, or rather to how our solar system works, not the universe. Neither the Earth nor the Sun are centers of the universe. They are both just small parts of a much larger picture, where the Sun is the center of the solar system, with the objects in the solar system orbiting around it, while the moons orbit both around the Sun and around their planets. The Sun though is part of a galaxy that has its own center, so the Sun together with all the other objects that orbit around it, orbit around the center of the galaxy.
Answer:
1 - b
2 - c
3 - d
4 - a
Explanation:
Oasis can be simply defined as a contrasting geological feature that is located somewhere in the desert areas, and this land area is rich in valuable nutrients, enriching the fertility of the soil. Water also is found in this particular area.
Out-migration can be referred to as the process where people shifts from one place to another, and is mainly done in order to search for job and settlement purpose.
Pastoral nomadism refers to the those individual that are directly dependent on the domesticated livestock such as cows, sheeps, chickens and many other. They usually move into the region which is suitable for collecting pasturage for these animals and livestock.
Salinization can be defined as the condition when the amount of salt in the salt is higher than the usual amount.
Thus, the correct answers are matched above.
The answers are B, C, & F.
A resource is a natural or manmade component that is harnessed by humans for a particular benefit, either subsistent or for enterprise. Examples of resources can be money, nonrenewable resources like crude oil and minerals, and biotic factors such as biodiversity. Energy is the most commonly used resources as it powers the global economies. People are also distributed across the globe according to the availability of resources. The more the resources, the higher the density of people in a region.
