Unit 6- How we organized ourselves.

The amount of people moving in an area.

Science that studies population.

Another word for the natural increase.

The amount of people moving in an area.Number of people living in an area. It constantly changes.

Number of deaths in a specific place.

Number of born people in a specific place.

The amount of people that are born each year.

The amount of people moving into a country.

Number of people who live in a specific area. To calculate it we need the number of total people and the km2 of the territory.

Social causes such as wars, hunger and poverty.

To have holidays.

Natural causes, such as floods, earthquakes and droughts.

To be closer to friends.

Economic causes: such as job opportunities.

Too many people in the cities and Not enough food in an area.

To visit friends.

Too much pollution in the water and air.

To learn a new language.

Too many people in the cities.

birth rate - death rate

death rate - birth rate

When people move from urban to rural areas.

When people move from rural to urban areas.

The average period that a person may expect to die.

The average period that a person may expect to live.