Biophysical Interactions + Population Geography

Topics: Demography, Population, Human geography Pages: 2 (492 words) Published: November 12, 2012
Geography Study Notes
Biophysical Interactions
Atmosphere- The blanket of air surrounding earth.
Biosphere- The living part of the planet that consists of a thin layer extending from just baove the earth’s surface to just below it; combined ecosystems of the earth. Hydrosphere- The part of the earth that is composed of water, including clouds, oceans, seas, ice caps, glaciers, lakes, rivers, underground water supplies and atmospheric water vapour. Lithosphere-The upper zone of the earth’s mantle and its inorganic mixture of rocks and mineral matter (including soil) in the earth’s crust.

Population Geography
The Changing Nature, Rate and Distribution of the Worlds Population Nature + Rate
It took 10 000 years for the world’s population to reach 1 billion, another 100 years to double to 2 billion and less than another century to more than triple to 6.6 billion today. The world’s population is growing at an exponential rate but this will start to slow as due to declining fertility rates. Developing countries account for 80% of the world’s population yet they account for 98% of the worlds annual population increase. This is because children are seen as a form of income in the least developing nation states. Developed countries the rate of population has slowed or remained steady. The future even holds in some areas a declining population. This is because children are seen as expenditure in developed nation states. The reason for this rapid growth of humans is the slash of child mortality rates and the increase of life expectancy due to technological advanncements. The demographics of people have changed which means people are more likely to live and live for longer. Distribution

This refers to population density or the numbers people per unit. Population distribution and density determined by largely biophysical oppurtunities and constraints. Europe, India has large population per km2 due to migration and increased birth rates. Factors affecting...
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