Using Earth’s Resources

Using the Earth’s Resources

Key Words

Ceramics – non-metal solids with a high melting points that aren’t made from carbon-based compounds. They’re insulators of heat and electriciy.

Polymers – insulators of heat and electricity, they can be flexible and are easily moulded.

Metals – malleable, good conductros of heat and electricity, ductile, shiny and stiff.

Alloys – made by adding another element to the metal.

Composites – made of one material embedded in another.

Thermosoftening polymers – contain individual polymer chains entwined toghter with weak forces between the chains.

Thermosetting polymers – contain monomers that can form cross-links between the polymer chains holding the chains together in a solid structure.

Corrosion – metals react with substances in their environment and are gradually destroyed.

Rust – the corrosion of iron.

The Haber Process – used to make ammonia from hydrogen and nitrogen, which is used to make fertilisers.

NPK fertilisers – formulations containing salts of nitrogen (N), phosphorus (P) and potassium (K) in the right percentages of the elements.


Also see Polymers, Resource Management

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