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Cool pots. Page 1. Grace lives in Sudan. Grace’s Mum, Hawa Abbas is a farmer. The temperature in Sudan is over 40 °C. Fruit and vegetables go rotten in a couple of days. The village Grace lives in does not have electricity so they cannot keep food cool in a fridge. Big question.

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  1. Cool pots Page 1 • Grace lives in Sudan. Grace’s Mum, HawaAbbas is a farmer. • The temperature in Sudan is over 40 °C. • Fruit and vegetables go rotten in a couple of days. • The village Grace lives in does not have electricity so they cannot keep food cool in a fridge. Big question How could Grace’s family keep their fruit and vegetables fresh for longer? Image courtesy: Practical Action Sudan

  2. Investigate Page 2 lid damp sand small yoghurt pot flower pot ice cube How will you compare the changes to each ice cube? Images courtesy: www.practicalaction.org.uk

  3. Predict Page 3 I think the ice cube in the double pot will start to melt but more quickly because the extra layer will make it warmer inside. I think the ice cube in the single pot will melt faster because there is nothing to block the sunlight. I think the ice cube in the double pot will start to melt but slower because the heat can’t get in so easily. I think the ice cube in the double pot will start to melt too but slower because it is cooler inside. What do you think will happen next?

  4. Page 3 What happened next...? Grace’s family made a zeer pot. A zeer pot is made of a large and small clay pot with damp sand filling the gap. As the water soaks through the large pot it evaporates. This cools the pot and keeps the food fresh. Small clay pot Large clay pot Damp sand Image courtesy: Practical Action Sudan

  5. Page 4 How has Grace’s life changed? Now Grace’s mum can keep the fresh fruit and vegetables they pick for longer. She can feed her family and sell any that are left over in the market. Grace in the zeer pot! Grace is happy that she can have delicious fresh tomatoes everyday. Grace’s mum putting fruit and vegetables into her zeer pot. Images courtesy: Practical Action Sudan

  6. Page 6 Acknowledgements This activity was produced by the Association for Science Education in partnership with Practical Action as part of the Global Learning Programme. Promoting Excellence in Science Teaching and Learning The GLP is a ground-breaking new programme which will create a national network of like-minded schools, committed to equipping their students to succeed in a globalised world by helping them to deliver effective teaching and learning about international development and global issues at Key Stages 2 and 3. ASE is providing the science education support for the Global Learning Programme which is funded by the Department for International Development. This activity can be found on the Global Learning Programme www.glp-e.org.uk, ASE Primary upd8 primaryupd8.org.uk and Practical Action practicalaction.org.uk/schools websites. Thank you to the children of Year 6 at Camp Primary and Nursery School, St. Albans for sharing their ideas and to their teachers for making time available for this project.

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