What is a population?

A population is a group of people living in a certain place. The population of your town or city is the number of people who live there. The population of your country is the number of people who live in your country. And the population of the world is the number of people who live on Earth.

Populations can be big or small. The population of China is over 1.4 billion people, which is the biggest population in the world. The population of the island of Niue is only around 1,600 people, which is one of the smallest populations in the world.

Populations can change over time. The population of the United States is growing, but the population of Japan is shrinking. This is because the birth rate in the United States is higher than the death rate, but the birth rate in Japan is lower than the death rate.

Populations can be studied by demographers. Demographers study how populations change over time. They look at things like birth rates, death rates, and migration. They also look at how populations are divided up by age, sex, and race.