Back to: Basic Technology Primary 3
Welcome to class!
In today’s class, we’re diving into a crucial topic: water purification. It’s like learning the magical art of turning dirty, contaminated water into pure, safe drinking water. Are you ready for this essential lesson? Let’s get started and become water purification wizards!
Water Purification
Water is vital for life, but it’s not always safe to drink straight from its source. Natural and human-made contaminants can make water harmful. Water purification is the process of removing these contaminants to make water safe to drink.
The Steps of Water Purification
Screening: The first step is to remove large objects like sticks, leaves, and debris from the water. This makes the water cleaner and easier to treat.
Coagulation: In this step, a chemical like alum is added to the water. It makes tiny particles stick together, forming larger clumps. These clumps are easier to remove.
Sedimentation: The water is left to sit quietly, allowing the clumps formed in the previous step to settle at the bottom. This leaves cleaner water at the top.
Filtration: Water passes through filters made of sand, gravel, or charcoal. These filters trap even smaller particles and remove them from the water.
Disinfection: To kill any remaining harmful bacteria and viruses, a disinfectant like chlorine or ultraviolet (UV) light is added to the water. This ensures the water is safe to drink.
Distribution: After all these purification steps, the clean water is ready to be sent to our homes and communities for us to drink and use.
The Importance of Clean Water
Clean water is essential for drinking, cooking, bathing, and keeping our homes and surroundings clean. It’s also vital for our health, as contaminated water can carry diseases.
Today, we’ve learned that water purification is like a magical process that turns dirty water into safe, clean water for us to drink and use. It involves steps like screening, coagulation, sedimentation, filtration, disinfection, and distribution.
Evaluation
Why is it essential to have clean and safe drinking water? Can you think of five ways you can help conserve water and keep it clean in your everyday life?
We have come to the end of today’s class. I hope you enjoyed the class!
In the next class, we shall be discussing Ways of Purifying Water
In case you require further assistance or have any questions, feel free to ask in the comment section below, and trust us to respond as soon as possible. Cheers!
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