Population Unit What do you need to know

Population Unit

What do you need to know? • Census – collecting data + issues. • Population Structure – pyramids, future impacts of over/under population, stage 5 of DTM. • Migration – causes and impacts of forced and voluntary migration.

Our Current Population http: //www. worldometers. info/worl d-population

Guess the population change. . • Draw a line down your jotter – 1800 at one end, present day at other • Write on where you think we reached: • 1 billion people • 2 billion • 3 billion • 4 billion • 5 billion • 6 billion • 7 billion

World Population Facts • In 2011, the world’s population reached 7 billion (7. 2 in 2014) – set to increase to 8 billion by 2050. • In about 1900, there was only about 1. 6 billion. • Currently about 6 billion people live in LEDC’s and 1. 2 billion live in MEDC’s • Cup Analogy = https: //www. youtube. com/watch? v=Vc. SX 4 y t. Efc. E

Line Graph 1804 1927 1960 1974 1987 1999 2011 2050 1 billion 2 billion 3 billion 4 billion 5 billion 6 billion 7 billion 10 billion

If 100 people lived on Earth. . . • https: //www. youtube. com/watch? v=c 2 DN 2 j. Cef. Yk

Key Population Definitions • • • Birth rate Death rate Natural Increase Life Expectancy Infant Mortality Rate

Key Terms • Birth Rate – number of births per 1000. • Death Rate – number of deaths per 1000. • Infant Mortality Rate – number of children that die per 1000 before 1 st birthday. • Life Expectancy – how long you are expected to live for. • Natural Increase – more births than deaths – increase in population.