Using the Earth's Resources Flashcards
(23 cards)
what do we use earth’s resources for
-warmth
-shelter
-food
-fuel
-transport
what are some examples of Earth’s natural resources
-cotton
-wool
-timber
what are some examples of synthetic resources
-plastic
-polyester
-acrylic
what is a finite resource
a resource that will eventually run out
what is sustainable development
development that meets the needs of current generations without compromising the ability of future generations to meet their own needs
what are the 4 main types of water
-pure water
-salt water
-fresh water
-potable water
in the UK, how is potable water extracted from fresh water
filtration and sterilisation
what is sterilisation
killing microbes
what are 3 examples of sterilising agents
-chlorine gas
-UV light
-ozone
how can potable water be produced from salt water
desalination
how can desalination be carried out
distillation or reverse osmosis
what are the 3 main types of waste water
-sewage
-agricultural waste
-industrial waste
what can waste water contain
-organic matter
-harmful microbes
-harmful chemicals
what is the first step in processing waste water
screening and grit removal
what is sedimentation
separating the waste water into sludge and effluent
how is sludge treated
anaerobic respiration
how is effluent treated
aerobic respiration
what is phytomining
using plants to extract copper
what is bioleaching
using bacteria to extract copper
what is a life cycle assessment
a way of assessing the energy costs and environmental effect of a product across its lifetime
what are the 4 stages of a life cycle assessmentq
-extracting and processing raw materials
-manufacturing and packaging
-use and operation during its lifetime
-disposal at the end of its useful life
how can we reduce the amount of new materials being manufactured
by reducing, reusing or recycling products
in what ways can materials that are not recycled be disposed
-landfill
-incineration
