Earth Topic 7 Chemistry 7.4 (QUESTIONS)
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12 Terms
What are natural resources?
They are raw materials in the Earth’s crust, oceans, and atmosphere
What are minerals?
They are naturally occurring compounds and metals
What is an ore?
It is a naturally occurring rock that has enough minerals in it for it to be taken out.
What is extraction of a metal?
It is the separation of the metal from its compound
What is electrolysis?
The process of breaking down a compound into its elements using a direct electric current
How do you do an electrolysis reaction?
The metal compound is heated into a liquid and a electric current passes through it to separate the metal with the compound
Give 2 metals that can be extracted with a displacement reaction.
Iron and copper
Give 2 metals that can be extracted with an electrolysis reaction.
Magnesium and aluminium
What are the 3 metals that are found naturally pure in the Earth?
Gold, silver, and platinum
What is recycling?
It is the process of collecting and processing used materials so they can be used again
What are the advantages of recycling?
Resources will last longer, it takes less energy to extract, doesn’t produce waste or pollution
How do you recycle aluminium?
You shred it and take off the decorations and heat it into liquid and then let it dry back into a solid in a mould (now and ingot) and it heated again into thin sheets and rolled up for use.