a) 4 billion b) 10 billion c) 6 billion

a)2 b)5 c)7

a) 1 b) 2 c) 3

a) 6b) 1c)3

a)15 b) 20 c) 4

a)16 b)21 c)30

a) Infection b) Diarrhea c) Heart disease

Lesson Objectives To introduce population To understand what natural change is To be able to suggest what effects natural change

KEY IDEA 1 Natural change rates of population vary across the world What is Natural change? Natural change refers to how a country’s population naturally changes over time. Countries can witness a NATURAL INCREASE whereby births exceed deaths or NATURAL DECREASE whereby deaths exceed births

The worlds population is projected to increase to 12 billion in 40 years, 24 billion in 80 years, 48 billion in 120 years,

Redless than 2declining population Yellowabout 2stable population Green3 to 4growing population Blue4 or more rapidly growing population Graydata not available Fertility – Children per family

Fertility rate world map

KEY DEFINITIONS Fertility rate – the average number of children born to women of the reproductive age Crude birth rate – total number of live births for every 1000 of the population Age specific birth rate – the number of births in a given age group in relation to the total number in the same age group

KEY DEFINITIONS Mortality - the rate at which people are dying in a population. Crude death rate – the total number of deaths per year per 1000 of the total population Age specific death rate – the number of deaths in a specific age group Standardised Mortality Ratio (SMR) - compares deaths observed with projected death rates ( in relation to age – sex projected statistics)