pure gold being 24 carat. 18 information to evaluate the carat gold is 75% gold. State properties of use of the alloys. examples of alloys. Steels are alloys of iron that Explain, in relation to the The Royal Society of contain specific amounts of structure, why these alloys Chemistry has many carbon and metals. High have these properties. resources to support carbon steel is strong but teachers in the classroom – brittle. Low carbon steel is including practical guides softer and more easily and instructions: shaped. Steels containing chromium and nickel (stainless steels) are hard and resistant to corrosion. Aluminium alloys are low density. 4.10.3.3 Most of the glass we use is Explain how low density 2 Describe how the following Research the physical More information soda-lime glass, made by and high density are produced and give uses properties of: about glass: heating a mixture of sand, poly(ethene) are both for each: sodium carbonate and produced from ethene. soda-lime glass limestone. Borosilicate glass, soda-lime glass borosilicate glass Video clips: made from sand and boron Explain the difference borosilicate glass clay ceramics trioxide, melts at higher between clay ceramics low-density poly(ethene) temperatures than soda-lime thermosoftening and low-density poly(ethene) high density poly(ethene) See also the glass. thermosetting polymers high density poly(ethene) composites series It’s ‘How in of their structures. composites. Made’ eg: Clay ceramics, including Use these properties to pottery and bricks, are made Compare quantitatively Using diagrams, describe explain how the materials by shaping wet clay and then the physical properties the structure of the are related to their use. heating in a furnace. of glass and clay following polymers: Compare the properties of Composite ceramics, polymers, thermosoftening thermosetting and materials: The properties of polymers composites and metals. thermosetting. thermosoftening polymers. depend on what monomers they are made from and the Explain how the Use these diagrams and clips conditions under which they properties of materials descriptions to explain why are made. For example, low are related to their uses the following happens when YouTube: density (LD) and high density heated: (long)
pure gold being 24 carat. 18 carat gold is 75% gold. Steels are alloys of iron that contain specific amounts of carbon and metals. High carbon steel is strong but brittle. Low carbon steel is softer and more easily shaped. Steels containing chromium and nickel (stainless steels) are hard and resistant to corrosion. Aluminium alloys are low density. State properties of examples of alloys. Explain, in relation to the structure, why these alloys have these properties. information to evaluate the use of the alloys. The Royal Society of Chemistry has many resources to support teachers in the classroom – including practical guides and instructions: 4.10.3.3 Most of the glass we use is soda-lime glass, made by heating a mixture of sand, sodium carbonate and limestone. Borosilicate glass, made from sand and boron trioxide, melts at higher temperatures than soda-lime glass. Clay ceramics, including pottery and bricks, are made by shaping wet clay and then heating in a furnace. The properties of polymers depend on what monomers they are made from and the conditions under which they are made. For example, low density (LD) and high density Explain how low density and high density poly(ethene) are both produced from ethene. Explain the difference between thermosoftening and thermosetting polymers in of their structures. Compare quantitatively the physical properties of glass and clay ceramics, polymers, composites and metals. Explain how the properties of materials are related to their uses 2 Describe how the following are produced and give uses for each: soda-lime glass borosilicate glass clay ceramics low-density poly(ethene) high density poly(ethene) composites. Using diagrams, describe the structure of the following polymers: thermosoftening thermosetting. Use these diagrams and descriptions to explain why the following happens when heated: Research the physical properties of: soda-lime glass borosilicate glass clay ceramics low-density poly(ethene) high density poly(ethene) composites Use these properties to explain how the materials are related to their use. Compare the properties of thermosetting and thermosoftening polymers. More information about glass: Video clips: See also the series ‘How It’s Made’ eg: Composite materials: clips YouTube: (long)
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