Natural Sciences and Technology Grade 6 Term 2: Matter and Materials Processes to Purify Water (ppt 1)

Topic 6 Processes to Purify Water Clean Water Gr. 6 Natural Sciences and Technology – Term 2, Topic 6

Why is clean water important? Clean water is a precious resource. People need clean water to drink, cook and wash. Animals and plants also need clean water to grow and be healthy. Gr. 6 Natural Sciences and Technology – Term 2, Topic 6

Remember how we can separate mixtures? Remember what you learnt about separating mixtures? Can you list some of the separation methods we looked at? Gr. 6 Natural Sciences and Technology – Term 2, Topic 6

Methods to separate mixtures Some of the separation methods are: filtering sieving settling decanting hand sorting Which of these methods can be used to clean water? Gr. 6 Natural Sciences and Technology – Term 2, Topic 6

Gr. 6 Natural Sciences and Technology – Term 2, Topic 6 How can we clean water? Some of the ways that we can clean water are: filtering settling decanting Gr. 6 Natural Sciences and Technology – Term 2, Topic 6

Gr. 6 Natural Sciences and Technology – Term 2, Topic 6 How can we clean water? Some of the ways that we can clean water are: filtering settling decanting boiling adding chemicals (like bleach - Jik) Gr. 6 Natural Sciences and Technology – Term 2, Topic 6

Gr. 6 Natural Sciences and Technology – Term 2, Topic 6 How can we clean water? Some of the ways that we can clean water are: filtering settling decanting boiling adding chemicals (like bleach - Jik) using a still Remind learners that they did their own experiment to learn how to use the power of the sun to purify water. Gr. 6 Natural Sciences and Technology – Term 2, Topic 6

Gr. 6 Natural Sciences and Technology – Term 2, Topic 6

Purify water with Jik A little chlorine / Jik in water kills bacteria safely. A teaspoon of "Jik", "Milton", or "Javel" bleach will purify 10 litres of water in an hour. Two teaspoons of bleach will purify 10 litres in 30 minutes. Gr. 6 Natural Sciences and Technology – Term 2, Topic 6