C16 Using Resources Flashcards
What is potable water?
Water that is safe for domestic use
What are the 2 steps in treating freshwater?
Filtration and sanitisation
What is sustainable development?
Meeting the needs of current generations without compromising the needs of those in the future
List 3 methods of disinfecting water:
-UV light
-Ozone
-Chlorine
What are the 2 methods of desalination?
Reverse osmosis and distillation
List 4 things that we use the Earth’s resources for:
-Warmth
-Food
-Transport
-Shelter
List 3 sources of waste water:
-Agriculture
-Urban usage
-Industry
Why must we treat wastewater?
Can damage ecosystems and pose a health risk to humans
Name 2 contaminants in agricultural wastewater:
Fertilisers and pesticides
Describe the process of sedimentation:
Water is left in a sediment tank, and suspended solids sink to the bottom
What are the 2 products of sedimentation?
Sludge and effluent
Describe the process of aerobic digestion in treating wastewater:
Air is pumped through the water, encouraging aerobic bacteria to break down organic matter and microbes
How can copper be produced from copper sulfide?
It can be heated in a furnace with oxygen, producing copper and sulfur dioxideL
List 2 disadvantages of using smelting to extract copper from copper sulfide:
-Produces sulfur dioxide
-Copper produced is impure
Describe how copper is purified after extraction:
An impure copper anode is connected to a pure copper cathode at either end of a terminal. The electrodes are submerged in a solution of copper sulphate. Copper is ionised at the anode, flows through the solution to the cathode and is reduced.
