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AQA c1b/a
Stack #71286
Key word | description |
---|---|
Alloy | A substance made by or conbining two or more metals |
Biodiesel | Diesel fuel made from plant materials |
Cement | A building material made from limestone and clay mixed with water |
Compound | A substance made from two or more types of atom |
Concrete | A building material made from sand, cement and crushded rock mixed with water |
Convection currents | the flow of a due to differences in temperature.(how tectonic plates move. |
Core | the central part of earth below the mantle |
Cracking | Breaking a molecule apart using heat |
Crust | the outermost layer of the earth |
E-Number | A number given to a food additive in order to identify it. |
Element | A substance made up of only one type of atom |
Emulsifier | A substance which stops the two liquids in an emulsion separating |
Emulsion | A mixture of tiny droplets of one liquid into another liquid |
Food additive | A substance added to food to improve its flavour, texture or shelf life |
Fractional Distillation | A way of separatinga mixture of substances according to their differeent boiling points |
Fossil fuel | Coal, oil or gas or any other fuel formed long ago from the fossilised remains of dead plants or creatures |
Gasohol | A mixture of petrol (gasoline) and ethanol |
Haematite | An ore containing iron combined with oxygen |
Hydrocarbon | A compound containing only carbon and hydrogen |
Mantle | The layer of the earth between the crust and the core. |
Monomer | A molecule that can combine with other, similar, molecules to form a polymer |
Mortar | Mixture of sand, cement and water used to hold building materials together |
Ore | Rocks that contain enough metal to make it economical to extact the metal |
Polymer | A substance consisting of very large molecules made of smaller identical molecules called monomers |
Quick lime | Heated lime stone |
Saturated | A hydrocarbon which contains as many hydrogen atoms as possible in each molecule |
Slag | the waste produced when iron is made in a blast furnace(always goes on top) |
Tectonic plates | Huge sections of the earths crust and upper mantle |
Thermal decomposition | splitting a substance using heat |
Unsaturated | A hydrocarbon which cointains a carbon-carbon double bond |