Science 3.0 / 5 based on 1 rating ? ScienceGCSEOCR Created by: FeeCreated on: 27-02-13 18:53 Tectonic plates can move by sliding past each other. State two other ways they can move. colliding & pulling apart. 1 of 15 Name three raw materials needed for the Industrial Revolution. Coal , Limestone and Salt 2 of 15 What are two uses of salt in the food industry? As flavouring and as a preservative. 3 of 15 What are two different ways to obtain salt? by mining it (Solution mining) and by evaporating sea water. 4 of 15 Why is salt classified as a possible hazard ? Salt can cause high blood pressure and heart failure. 5 of 15 How can the risk of salt be estimated? By measuring salt intake or adding totals from food labels. 6 of 15 Describe how the UK government regulates food safety. The government regulates food safety through agencies; the agencies carry out risk assessments and provide advice to the public. 7 of 15 Name two traditional sources of alkalis Stale urine and burnt wood 8 of 15 Why were alkalis in short supply before the industrialisation? There were few sources and the demand was greater than the supply. 9 of 15 What two toxic by-products of the the Leblanc process were given off? Hydrogen chloride gas and sulfide gas. 10 of 15 Describe the role of a mordant in the dying process A mordant sticks dye to fabric 11 of 15 Why do people die from typhoid in countries like in the UK? They may have been infected on holiday or by drinking untreated water. 12 of 15 Disadvantages from chlorinating water supplies. Chlorine reacts with organic materials which forms toxic or carcinogenic compounds. 13 of 15 What are the three products made when the electroysis method is used to break up brine? Hydrogen, chlorine and sodium hydroxide. 14 of 15 What is a possible environmental impact of brine elecrolysis? how it can be reduced? Chlorine is linked to ozone depletion as it was used in fridges and aerosol which have now been banned. Fridges have to be deposed of in a safe way. 15 of 15
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