Natural Sciences and Technology Grade 6-A - Thunderbolt Kids
Natural Sciences and Technology Grade 6-A - Thunderbolt Kids Natural Sciences and Technology Grade 6-A - Thunderbolt Kids
QUESTIONS: 1. Look at the pictures above and make a list of all the objects that do not belong in the water. 2. What are the three main categories of pollutants found in water? 3. Which category of pollutants would you be able to see with the naked eye? 4. Which categories of pollutants would you not be able to see with the naked eye? 5. How do you think insoluble pollutants end up in water? 6. How do you think soluble pollutants end up in water? 7. How do you think bacteria that cause illness like diarrhoea and cholera end up in water? 176 Matter and Materials
8. How do you think oil ends up in the water, especially in oceans? 9. What do all 3categories of pollutants have in common? Have you noticed that humans and their activities are often the reason why water becomes polluted? As humans, we often forget that we are sharing this natural resource with many other organisms. Many of our activities can change the quality of the water in away that aects the health and behaviour of other organisms. So, as humans, we have a very important responsibility to look after our water resources. 5.2 Importance of wetlands Nature has special methods of cleaning polluted water. In nature, water is purified in natural environments called wetlands. Wetlands are very ecient natural 'water treatment' facilities, and in this section we will learn how they work. Chapter 5. Mixtures and water resources VISIT BP oil spill in Gulf of Mexico (video). goo.gl/OCmEG NEW WORDS • wetland • water table • waterlogged 177
- Page 135 and 136: 3. Can you separate the mixture int
- Page 137 and 138: INSTRUCTIONS: 1. Place 10 scoops of
- Page 139 and 140: Picture of mixture INSTRUCTIONS (Pa
- Page 141 and 142: REVISION: 1. What is amixture? 2. L
- Page 143 and 144: Now that we know more about mixture
- Page 145 and 146: ACTIVITY: When is amixture also aso
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- Page 153 and 154: In the previous chapter, we saw how
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- Page 159 and 160: dissolved limestone can crystallise
- Page 161 and 162: KEY CONCEPTS • A solution is aspe
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- Page 165 and 166: It was quite dicult in the beginnin
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- Page 181 and 182: REVISION: 1. What are the 3factors
- Page 183 and 184: We have learnt a lot about solution
- Page 185: ACTIVITY: Thinking about pollution
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- Page 191 and 192: INSTRUCTIONS: 1. Drill ahole in the
- Page 193 and 194: QUESTIONS Do you remember studying
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- Page 197 and 198: Water is very important for us and
- Page 199 and 200: QUESTIONS 1. What does 'clean water
- Page 201 and 202: ACTIVITY: Cleaning water in astill
- Page 203 and 204: Filtering is agood way of removing
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- Page 211 and 212: STEP 3: AERATION The raw water now
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QUESTIONS:<br />
1. Look at the pictures above <strong>and</strong> make a list of all the objects<br />
that do not belong in the water.<br />
2. What are the three main categories of pollutants found in<br />
water?<br />
3. Which category of pollutants would you be able to see with<br />
the naked eye?<br />
4. Which categories of pollutants would you not be able to see<br />
with the naked eye?<br />
5. How do you think insoluble pollutants end up in water?<br />
6. How do you think soluble pollutants end up in water?<br />
7. How do you think bacteria that cause illness like diarrhoea<br />
<strong>and</strong> cholera end up in water?<br />
176 Matter <strong>and</strong> Materials
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