provide habitats for many living organisms. Required practical 11: 4.4.1.8 Water that is safe to drink is Define the terms 1 Discussion question what Video clip – analysis and purification called potable water. Potable potable water and pure does 'potable' mean? YouTube: of water samples from water is not pure water in the water. What are the similarities and different sources, Resources for chemical sense because it Explain the differences differences between potable including pH, dissolved schools - contains dissolved between the two terms. water and pure water? solids and distillation. substances. Several Describe the Students find out about solar Chemistry AT2, 3 and 4 companies provide The methods used to differences in disinfection and outline the resources for schools produce potable water Students design a treatment of ground advantages and disadvantages regarding sewage depend on available supplies sustainable drainage water and salty water. of water purification at the point treatment, eg of water and local conditions. system (SuDS), eg for of use. In the UK, rain provides water their school. Links to clip How can we know that is with low levels of dissolved reducing risk of flooding YouTube: safe to drink? substances (fresh water) that and preventing water collects in the ground and in pollution. Information about Make from information lakes and rivers and most SuDS. leaflets about sewage On average, adults potable water is produced by: treatment processes and use produce 200 g choosing an appropriate to draw a diagram to faeces/day; a stool is source of fresh water summarise. 75% water. Students passing the through use these figures to How do reed beds work as filter beds to remove any make estimations water treatment systems? solids regarding the quantity WS 1.4 sterilising to kill microbes. produced by a local conurbation over given Explain everyday and Sterilising agents used for periods of time. technological applications of potable water include science; evaluate associated
provide habitats for many living organisms. 4.4.1.8 Water that is safe to drink is called potable water. Potable water is not pure water in the chemical sense because it contains dissolved substances. The methods used to produce potable water depend on available supplies of water and local conditions. In the UK, rain provides water with low levels of dissolved substances (fresh water) that collects in the ground and in lakes and rivers and most potable water is produced by: choosing an appropriate source of fresh water passing the through filter beds to remove any solids sterilising to kill microbes. Sterilising agents used for potable water include Define the terms potable water and pure water. Explain the differences between the two terms. Describe the differences in treatment of ground water and salty water. 1 Discussion question – what does 'potable' mean? What are the similarities and differences between potable water and pure water? Students find out about solar disinfection and outline the advantages and disadvantages of water purification at the point of use. How can we know that is safe to drink? Make from information leaflets about sewage treatment processes and use to draw a diagram to summarise. How do reed beds work as water treatment systems? WS 1.4 Explain everyday and technological applications of science; evaluate associated Required practical 11: analysis and purification of water samples from different sources, including pH, dissolved solids and distillation. Chemistry AT2, 3 and 4 Students design a sustainable drainage system (SuDS), eg for their school. Links to reducing risk of flooding and preventing water pollution. On average, adults produce 200 g faeces/day; a stool is 75% water. Students use these figures to make estimations regarding the quantity produced by a local conurbation over given periods of time. Video clip YouTube: Resources for schools - Several companies provide resources for schools regarding sewage treatment, eg clip YouTube: Information about SuDS.
AQA-8465-SOW-EXCH.DOCX