ICSE Class 8 Geography — Flashcards

A: A contour line is an imaginary line joining all places which are at the same height above sea level. It is drawn in brown on topographical maps and helps show the shape of the land.

A: The contour interval is 20 m. This means the vertical distance between two adjacent contour lines is 20 m.

A: Contours of different elevation usually do not cross each other because each contour shows places at one exact height above sea level.

A: Population means the total number of people living in a specific area at a particular time. It is not fixed; it changes over time because of births, deaths, and migration.

A: Population dynamics is the study of how and why population changes in size and structure over time. It looks at growth, decline, age pattern, sex pattern, and movement of people.

A: Population density is the number of people living in a given area. It is measured as the total population of a country divided by the total land area of the country, usually in people per square kilom

A: Migration is the movement of people from one place to another to live or work there. It may happen for a short time or for a long time, and it can be within the same country or across countries.

A: People migrate because of social, cultural, economic, and political factors. Common reasons include better jobs, better education, safety, shelter, and better living conditions.

A: A push factor is a forceful reason that comes from the place a person is leaving. It is usually a problem that makes people want to move away, such as poor medical care, not enough jobs, droughts, nat