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GCSE GE OGR APHY

REVISI
O N GUIDE





EDE XCEL B

































TOPIC 3: BATTLE FOR THE BIOSPHERE

What do you need to know?
· How to describe the distribution of biomes across the Earth's surface
· How climate (temperature and precipitation) influences the distribution and types of biomes
· How…

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· How the biosphere provides goods (resources) that humans use
· How goods and services support human life on Earth
· How humans are directly degrading biomes by their actions, such as deforestation including a
named example
· How climate change is affecting biomes
· Why humans need to conserve…

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Sustainability The idea that the current generation of people should not damage the
environment in ways that will threaten future generations
environment
Unsustainable Unable to be kept going at the same rate or level
Water Table The level in the soil or bedrock below which water is usually present
Wilderness…

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How climate (temperature and precipitation) influences the
distribution and types of biomes
Average temperature is the main factor affecting plant growth. Temperature gradually decreases as
you move away from the equator and as latitude increases, so temperature decreases.
LATITUDE:











At the equator the sun's rays hit the earth at right…

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A climate graph...

The RED line graph = average
temperature for each month.
The BLUE bar graph = average
rainfall for each month.
TEMPERAURE RANGE = difference
between min and max temperatures.






How the biosphere provides important services to humans
Goods and services
GOODS = things of value to us…

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- the periwinkle plant is used to treat Hodgkin's disease

How goods and services support human life on Earth
In Britain, deciduous forest wood helped make and fuel the factories that drove the industrial
revolution
Tropical rainforests are vital for poor countries in South America where wood is used in…

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food ­ nuts, fruit, meat, fish
grow crops ­ shifting cultivation (sustainable process)

Causes:
The tropical rainforest is currently being exploited for a number of purposes:
TNC's exploit the TRF
logging for timber/paper (100,000sq km of forest cut down every year)
farming ­ soya ­ Growth in soya cultivation has…

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How global actions and agreements could help make this possible,
including examples
GLOBAL ACTIONS... (Countries working together)
RAMSAR conserving wetlands
CITES stop ivory trade/crocodile skins
Rainforest conservation Introduced of `debt-for-nature' swap agreements e.g. USA reduced
the size of Guatemala's foreign debt repayments in exchange for less rainforest to be cut…

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in some countries it costs to enter them. This money helps maintain the area.
economic benefits- they contribute £1.6bn to the economy.

LOCAL ACTIONS... (local area)
Biodversity action plans e.g Havering Wildlife Trust, Bedfords Park.

Named Example: Local Action in the Caledonian Forest
This forest is all that remains from…

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