KCo
KCo
Starter 1
KCo
What do you think this cartoon is trying to
show?
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
How accurate were you?
World Population clock Weblink
www.odci.gov/cia/publications/factbook
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
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.
•KCoThe graph shows this pattern of accelerating growth (including the predicted
population for 2025).
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
KCo
them in terms of population growth?
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
KCo
Record these key terms and equations in your
exercise book.
How do these factors affect the total
population?
KCo
THE POPULATION CLOCK
TIME UNIT
YEAR
MONTH
DAY
HOUR
MINUTE
SECOND
BIRTHS
DEATHS
NATURAL
INCREASE
128,746,122 55,660,746 73,085,376
10,728,844 4,638,396 6,090,448
352,729
152,495
200,234
14,697
6,354
8,343
245
106
139
4.1
1.8
2.3
How many births are there in 5 seconds?.
How many deaths are there in 5 minutes?
KCo
World
Population
Clock
By how much does the population change in 2 days?
Activity
Can 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
Activity
Country
Birth rate
per 1000
Death rate
per 1000
Natural
increase per
1000
Bangladesh
Brazil
France
41
26
13
14
8
27
UK
Mexico
India
27
31
Japan
12
12
5
3
2
21
4
Copy and complete the table above using the notes you made
earlier to help you with equations.
KCo
What do you notice about the countries?
Activity
Country
Birth rate
per 1000
Death rate
per 1000
Natural
increase per
1000
Bangladesh
Brazil
France
41
26
13
14
8
27
UK
Mexico
India
27
31
Japan
12
12
5
3
2
21
4
Copy and complete the table above using the notes you made
earlier to help you with equations.
KCo
What do you notice about the countries?
How do these
figures link to the
graph we saw
earlier?
KCo
Extension
Watch the newsbite about the world’s population reaching 7
billion people
KCo
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-15445092
Activities
Connections 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.
KCo
•
•
Why do LEDCs have higher birth rates?
Why do MEDCs have lower death rates?
PLENARY
• With so many people on the planet what
problems could we face?
KCo
Homework
Population Change
Investigation
Use the BBC website to
investigate population
change and complete the
questions on the sheet
KCo