kco. starter 1 what do you think this cartoon is trying to show? kco
TRANSCRIPT
Can the Earth Cope?
KCo
KCo
Starter 1
What do you think this cartoon is trying to show?
KCo
KCo
OBJECTIVES:
1. To understand that the earth’s population is increasing and to be able to explain
why.
2. To define birth rate, death rate and natural increase
3. To identify factors that affect population change
KCo
What is the population of the world?
Jot down your answer in the back of your book
www.odci.gov/cia/publications/factbook
How accurate were you?World Population clock Weblink
At present the world's population is growing quickly, though this has not always been the case.
• Until the 1800s the world's population grew slowly for thousands of years.• In 1820 the world's population reached one billion.• In the early 1970s, the world's population reached three billion.• In 1999, less than 30 years later, the population doubled to six billion (population
explosion)• The global rate of population growth is now one billion every 15 years.• The graph shows this pattern of accelerating growth (including the predicted
population for 2025).KCo
Skills task:How would you describe this graph showing world population growth?• State the trend/ pattern
(increase/ decrease/remains steady)
• Highest and lowest figures• Quote figures to support
key ideas
What does this graph suggest about the growth in the world population?
What are developed and developing countries?
Why do you think there is such a difference between them in terms of population growth?KCo
KCo
Population change depends mainly upon the balance between:• Birth rate• Death rate• Migration
• Birth rate- the number of live babies born in a year for every 1000 people in the total population, e.g. 25/1000
• Death rate- the number of deaths each year per 1000 people in the total population
• Natural increase- the difference between the birth rate and death rate
Birth rate – death rate = natural increase
Record these key terms and equations in your exercise book.
KCo
How do these factors affect the total population?
KCo
THE POPULATION CLOCK
TIME UNIT BIRTHS DEATHS NATURAL INCREASE
YEAR 128,746,122 55,660,746 73,085,376MONTH 10,728,844 4,638,396 6,090,448
DAY 352,729 152,495 200,234HOUR 14,697 6,354 8,343
MINUTE 245 106 139SECOND 4.1 1.8 2.3
How many births are there in 5 seconds?.
How many deaths are there in 5 minutes?
By how much does the population change in 2 days?
World Population Clock
KCo
ActivityCan you think of some times and numbers that you are
familiar with?
Use your times and the figures from the previous table to describe 2 ideas.
e.g. It takes me 13 seconds to run 100 metres. In that time there would be an extra 53 births.
KCo
Country Birth rate per 1000
Death rate per 1000
Natural increase per
1000
Bangladesh 41 14 27
Brazil 26 8
France 13 3
UK 12 2
Mexico 27 5
India 31 21
Japan 12 4
Copy and complete the table above using the notes you made earlier to help you with equations.
What do you notice about the countries?
Activity
KCo
Country Birth rate per 1000
Death rate per 1000
Natural increase per
1000
Bangladesh 41 14 27
Brazil 26 8
France 13 3
UK 12 2
Mexico 27 5
India 31 21
Japan 12 4
Copy and complete the table above using the notes you made earlier to help you with equations.
What do you notice about the countries?
Activity
KCo
How do these figures link to the
graph we saw earlier?
ExtensionWatch the newsbite about the world’s population reaching 7
billion people
Watch the BBC clip about the world population reaching 7 billion people and what is predicted for the future.
http://www.bbc.co.uk/news/world-15445092KCo
KCo
ActivitiesConnections pages 90-91 new edition (70-71 old edition).
Complete the ‘extras’ activities.
KCo
Population growth has not been even throughout the world. The fastest growth has been in the poorer, less
economically developed countries. There is very slow growth in the richer, more economically developed
countries.
• Why do LEDCs have higher birth rates?• Why do MEDCs have lower death rates?
KCo
PLENARY
• With so many people on the planet what problems could we face?
Homework
KCo
Population Change Investigation
Use the BBC website to investigate population
change and complete the questions on the sheet