Extraction Of Aluminium Pdf 180511 | Year 8 Science Week Com 20 Aluminium Extraction And Recycling Q Ws

Partial capture of text on file.

                                                                                                                                                                                   BMS – Yr8 Earth – Earth Resources C 
                                             Aluminium is used to make many items. 
                                                                                                                                                                                                                                           
                                                                                                                                                 
                                                                                                                                                 
                                                                                                                                                 
                                             Aluminium is extracted from aluminium ore. Aluminium ore is called bauxite, which is 
                                             impure aluminium oxide. 
                                             The flow chart shows the main steps in the extraction of aluminium from aluminium ore. 
                                                                                                                                                                                                        
                                              
                                             Most aluminium is recycled. 
                                             Aluminium is recycled by melting scrap aluminium at 700 °C. 
                                             Use your own knowledge and the information given to answer the question. 
                                              
                                              
                                                                                                                               Page 1 
                                        BMS – Yr8 Earth – Earth Resources C 
          Suggest why most aluminium is recycled. 
          1................................................................................................................................. 
          ................................................................................................................................. 
          ................................................................................................................................. 
           
          2................................................................................................................................. 
          ................................................................................................................................. 
          ................................................................................................................................. 
           
          3................................................................................................................................. 
          ................................................................................................................................. 
          ................................................................................................................................. 
           
          4................................................................................................................................. 
          ................................................................................................................................. 
          ................................................................................................................................. 
           
          5................................................................................................................................. 
          ................................................................................................................................. 
          ................................................................................................................................. 
           
          6................................................................................................................................. 
          ……………………………………………………………………………………………… 
          ………………………………………………………………………………………………. 
                                                           
         
         
         
                                                   (Total 6 marks) 
                                                           
                                                           
                                                           
                                                           
                             Page 2 
                                                  BMS – Yr8 Earth – Earth Resources C 
          
           
          
          
         M1. 
             examples of chemistry points made in the response 
             extraction: 
             •        limited resources of aluminium oxide 
             •        higher temperatures required 
                        allow quoted temperatures eg extracted at 950°C 
             •        large amount of energy required 
             •        expensive 
             •        requires mining / quarrying 
             •        process takes longer / has more stages 
             •        produces more carbon dioxide / greenhouse gases 
             recycling: 
             •        saves resources 
             •        cheaper to recycle 
             •        uses less energy 
             •        only needs to be melted 
                        allow quoted temperatures eg melted / recycled at 700°C 
             •        less electricity needs to be used 
             •        less effect on environment 
             •        example of effect on environment 
                        eg less destruction of habitats 
             •        avoids need for disposal / use of landfill 
             •        no need for quarrying 
             •        sustainable 
                                                                    6 
                                                                      [6] 
                                                                         
                                                                         
                                                                         
                                                                         
                                    Page 3

The words contained in this file might help you see if this file matches what you are looking for:

...Bms yr earth resources c aluminium is used to make many items extracted from ore called bauxite which impure oxide the flow chart shows main steps in extraction of most recycled by melting scrap at use your own knowledge and information given answer question page suggest why total marks m examples chemistry points made response limited higher temperatures required allow quoted eg large amount energy expensive requires mining quarrying process takes longer has more stages produces carbon dioxide greenhouse gases recycling saves cheaper recycle uses less only needs be melted electricity effect on environment example destruction habitats avoids need for disposal landfill no sustainable...

Related files

Share

Help

Related files

Share

Share to social media

Help

Login Area