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The population of the world is changing - Edexcel - GCSE Biology - Question 1 - 2011 - Paper 1

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Question 1

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The population of the world is changing. The graph shows this change between 1950 and 2010. An estimate of the changes between 2010 and 2050 is also shown. (i) Sta... show full transcript

Worked Solution & Example Answer:The population of the world is changing - Edexcel - GCSE Biology - Question 1 - 2011 - Paper 1

Step 1

State the general trend shown in the graph between 1980 and 2000.

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Answer

The general trend shown in the graph between 1980 and 2000 is an increase in world population. The graph demonstrates a steady upward trajectory, indicating that the population consistently rose during this period.

Step 2

Calculate the difference in world population between 1980 and 2000.

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Answer

From the graph, the population in 1980 is estimated to be around 4.5 billion, and in 2000 it is approximately 6.0 billion. To find the difference:

extDifference=extPopulationin2000−extPopulationin1980=6.0extbillion−4.5extbillion=1.5extbillion ext{Difference} = ext{Population in 2000} - ext{Population in 1980} = 6.0 ext{ billion} - 4.5 ext{ billion} = 1.5 ext{ billion}

Thus, the difference in world population between 1980 and 2000 is 1.5 billion.

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