Resources - Quick Revision Sheet

Quick revision

Largest producers

Key numbers

• Iron ore: magnetite 72%, hematite 70%, limonite 50%, siderite 30%; below 30% uneconomical.
• Coal carbon: peat 30-35%, lignite 35-45%, bituminous 70-90%, anthracite above 95%.
• Middle East: about 60% of world oil reserves.
• Nuclear: about 11% of world electricity; hydel about 7%; wind about 5%.
• Kamuthi solar plant: 648 MW, 2,500 acres, completed 21 September 2016.

Key terms

• Ubiquitous resource: exists everywhere, like air.
• Lode: a larger occurrence of mineral in rock joints; a smaller one is a vein.
• Alloy: metal made by combining two or more metallic elements.
• Exhaustible: resources that exist in finite quantity.
• Green energy: natural gas, due to low carbon dioxide emissions.
• Fool's gold: pyrite, which looks like gold.