Population Growth
Q1: What do you mean by Population Growth?
Answer:
Population growth refers to the increase in population size during a particular period of time. The size of a population of a species keeps on changing with time to time depending on the various factors such as weather, food availability and predation pressure.
Q2: Define Birth rate.
Answer:
Birth rate is defined as the ratio between total number of live human births in the year and average total population of that year. Birth rate is also known as natality. An increase in the birth rate increases the population size.
Q3: Define the Death rate.
Answer:
Death rate is defined as the number of people per thousand who die in a particular area during a particular period of time. Death rate is also known as mortality rate or fatality rate. An increase in the death rate decreases the population size.
Q4: Name the types of population growth models.
Answer:
There are two types of population growth models:
- Exponential growth
- Logistic growth
Population Growth – CBSE Class 12
Population Growth: Population growth refers to the increase in the number of people in a given area in a particular period of time. It is the main cause of this world because the population of human beings is not a static factor. Population growth depends on various factors such as weather, food availability, and predation pressure. The density of population changes during a given period due to changes in four basic processes two of which natality and immigration contribute to an increase in population and the other two mortality and emigration contribute to the decrease in population.
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