Geography chapter 2.1 , 2.2 , 2.9 , 4.1 , 4.3 , 4.5 Flashcards
(37 cards)
What are reasources?
Thing we need to live or earn a living
what are the five basic needs to survive?
food
water
clothing
shelter
energy(heat)
why is soil an important recourse?
to farm
what are some extra things natural things that the earth provides?
metals
gas
oil
whets the population of earth?
8 billion people
is the earths supply of natural recources infinite or finite?
finite
what is a natural recourse?
a natural resource is when something occurs naturally. (not by humans but allah)
what are some examples of natural recourses? (6)
soil
water
wind
sunlight
coal
oil
how do we make plastic?
it is made in factories, from chemicals obtained from oil
what are renewable recources?
renewable recourses are recourses that we can keep using without running out.
where are natural recourses?
natural recourses are found everywhere but not shared equaly
what percentage of water is fresh?
3%
what percentage of fresh water is available?
1%
where do we get our fresh water?
in the UK around 28% of our total water supply is ground water, pumped up from aquifers. the rest is surface water, pumped from rivers or from reservoirs.
what do you use water for?(3)
farming-about 70% is used in farming, most of it is for irrigating crops.
industry-about 19% is used in industry, for washing, as a solvent, for making steam in power stations.
domestic use-about 11% is used in homes for washing, cooking, watering plants and drinking.
do we have enough fresh water?
the answer is no, not if we carry on as we are! many countries have a water crisis already, or soon will
state the 5 stages of the water cycle.
- in the water cycle the water vapor from the salty oceans condenses to fresh water which falls as rain.
- but rain falls very unequally around the world and climate change is adding on to the problem. wet regions may get even more rain and dry regions even less.
- rain soaks through the ground to give ground water, some ends up in aquifers, we pump it out to use it.
4.rain also runs over and through the ground and into rivers, we pump it out of rivers too.
- earths population is growing over 80million a year so the amount of fresh water is growing too. in some places we pump more water than the rain can replace. the result, “water stress”.
what is water stress?
water stress is where a country cant meet its demand for fresh water.
what do power stations burn to spin their turbines?(3)
and give an example.
wood
straw
waste
NORWAY
how does a hydro electric power station work? and give an example.
fast flowing rivers spin the turbines to give electricity. BRAZIL
how does a wind farm work? and give an example.
Wind turns the blades which are joined to the turbine which generates electricity when it spins. New Zeland
how does a wind farm work? and give an example.
Wind turns the blades which are joined to the turbine which generates electricity when it spins. New Zeland
how does a tide farm work? and give an example.
as the tide rises and falls, the tide can also spin turbines which generate electricity. SCOTLAND
how does a Solar farm work? and give an example.
Sunlight strike pv cells, giving electricity