How are the following linked to population?

L.O. 1: To identify what affects birth and death rates

How does population change?

Copy the following definitions into your books

Birth RateThe number of births per 1,000 in the

population.

Death Rate

The number of deaths per 1,000 in the population.

Natural increase

When there are more births than deaths therefore the population increases

How many people can live on planet earth?

How does the World’s population change?

Births = deaths no population change

Births < deaths natural decrease

Births > deaths natural increase

Can you remember the DTM model

• Have a go at drawing it on your whiteboard!

• Without using your books!!!!!

• To identify the reasons why birth and death rates change

• To explain the reasons for these changes

• To annotate the DTM with 7-12 labels explaining the changes in BR and DR

What causes changes in births and deaths?

• Food shortages• Good harvest• Improved water supply• Children are needed to work• New hospitals• Poor health care• Wars• Birth control• Tradition for large families

So what causes changes in births and deaths?

LIST 1• A terrible war breaks out• Everyone gets better

food to eat• A deadly disease

spreads• There is a severe famine• More hospitals and

doctors are provided• Birth control pills are

invented• More women and men

get good jobs

For each change in list 1, choose the likely result from list 2. Write your answer as a full sentence

LIST 2

1. death rate falls

2. Death rate rises

3. Birth rate falls

4. Birth rate rises

5. No effect on births or deaths

Does anything surprise you about this graph?

Does anything worry you?

What about stage 5?

• What is happening in stage 5?

• Why has this happened?

• What are the impacts of this change?