4. Describe in detail the factors affecting the population change
Answers
How do population grow and sink ?
What does 7 billion people look like? It might be hard to imagine that many people, but the world's population actually exceeded that number in 2011. Why are cities more crowded than the countryside? Why do some countries have more people than others? All of these questions are asking about population change, which means the rate at which the population is increasing or decreasing at a given time. In this lesson, we'll go over the three main factors that cause population change: birth, migration, and death. Let's talk about each of these in detail.
BIRTH RATE
Now, this might seem very obvious to you, but when babies are born, it results in a population change! Social scientists who study this trend have some key terms, though. First, the fertility rate in a country refers simply to the number of children born. This is different from the fecundity rate, which is the number of children who could be born in a given society. In other words, fecundity is the biological capacity of humans to produce children.
DEATH RATE
Just as when babies are born, when members of a society die it changes the population. This might be a bit morbid to think about, but scientists refer to this as the mortality rate, which is simply the number of deaths that occur in a society. This is usually calculated by looking at the number of deaths per 1,000 individuals. In the United States, for example, the death rate is 8/1000 people. Just like birth rate, the death rate in a country depends on things such as availability of quality medical care, disease, war, or famine.
MIGRATION RATE
One important factor that accounts for a change in population is migration. At the broadest level, migration refers to movement; it's the flow or circulation of people in societies. There are two kinds of migration: emigration and immigration. Emigration means to leave one's own country for another. Immigration means to enter into a country other than one's own. Both of these processes impact population change.
Answer:
The climate influence temperature, cloudiness, humidity,the frequency and intensity of precipitation,and wind pattern each of which can influence air quality.
