C10-Using Resources Flashcards
What do we need resources for
Warmth
Shelter
Food
Transport
What do we supplement natural resources from
Agriculture
What is sustainability
Using natural resources in a way they does not compromise future generations ability to do the same
What is potable/safe water
Water that has low levels of dissolved salts and microbes that is safe to drink
How can water be sterilised
Using chlorine,ozone or UV
What is Desalination and state a disadvantage
Removal of salt by distillation or reverse osmosis so it is safe to drink
Cons— requires a lot of energy
How is waste water made
From using the toilet
Industrial processes
How can pure metals be obtained
From electrolysis or displacement reaction
What is phytomining
Plants absorb copper ions into their roots
Burn, then obtain copper from the ash
What is bioleaching
Bacterial produce LEACHATE solutions that contain copper ions that can be extracted
Why is a life cycle assessment done
Carried out to predict the impact of a new product on the environment
What is considered in a life cycle assessment
Extraction and processing of raw materials
Manufacturing and packaging
Use over its lifetime
Disposal
Transportation
Why does iron rust
Due to its reaction with oxygen
Why does copper corrode ?
When it reacts with oxygen to make Copper Oxide
What colour is aluminium oxide
White
What can we do to make sure metals don’t corrode
Use sacrificial metals
Covering another metal in zinc is called…..
Galvanising
What are alloys
Mixtures of different metals to fulfil a specific need
What is bronze made up of
Copper and tin
What is brass made up of
Copper and zinc
What is steel made up of
Iron and carbon
What is STAINLESS steel made up of
Steel + Chromium/nickel
What is soda lime glass made up of
Heating sand , sodium carbonate and limestone
How do you make Borosilicate glass
Sand and boron trioxide
