Water filtration experimentDÍA DEL AGUA

SCIENCE EXPERIMENT

WATER

August, 24 th

“Water is the driving force of all nature.” — Leonardo da Vinci

water filtration

In this lesson, you will learn about the water cleanning process, which involves water filtration and how to make your own WATER FILTER.

Let`s watch the video to learn some more.

Materials:

- 3 empty plastic transparent water bottles (1/2 litre) - Scissors - Watch (cronometer) - Paper towel - 3 Rubber bands - Sand or gravel (1 cup) - Any two materials you think will make a great filter, examples: cotton balls, uncooked pasta noodles, coffee filters, etc.

INSTRUCTIONS

- You should work in groups of 2-3 students. Document your observations. 1. Create a dirty water sample Start by preparing the water you’re going to filter. For example, mix some soil or dirt with tap water for an easier challenge. This dirty water sample will simulate wastewater.

2. Build your filter cartridge To build your own filtration system, you’ll need a filter cartridge. Start by carefully cutting your water bottle in half, across the width of the bottle. Remove the cap from the bottle. Put gauze or cheesecloth over the opening and secure it with a rubber band. Turn the top half of the bottle upside down (so the part with the cheesecloth or gauze is facing down) and place it into the bottom half of the bottle. If you want to fit more materials in your filter, you can use two bottles. Note: Clear containers will help you see the filtration as it takes place.

3. Design your filter Mix or layer the filter materials you’ve collected in the top of your filter cartridge. Write down what filtration materials you use and how much.

4. Test and evaluate the results Pour your simulated wastewater into your filter and observe the water that comes out at the bottom of the filter. How effective was your filter at cleaning the water? Write down what you notice. How long did it take to filter the water? What worked well? What could be improved? Important safety note! No matter how “clean” your filtered water looks, you should never drink it because it still may contain pollutants you can’t see.

LET`S MAKE OUR WATER FILTER:

We are going to build a device that can clean a dirty water sample using materials around your home. To do so, you will use an iterative process, meaning you will test multiple designs, look at how your materials get you closer to your goal, and record your findings to build the best filter possible.Important safety note! This activity is not designed to make drinkable water. No matter how “clean” your filtered water looks, you should never drink it because it still may contain pollutants you can’t see.

5. Revise and try, try again! Revise your filter based on what you saw during the last step. Then, test it again. Consider using the same amount of wastewater for each test so you can better evaluate how well your filter is working. As you revise, you’ll find that some filter materials work better than others – not just at filtering out solids like dirt, but also in removing colors. Keep redesigning and testing your filter. Your goal is to produce as much clean water as possible during a single time through the filter. Remember: Do not drink the dirty or filtered water!

Let`s watch the demostration.

now, let`s start experimenting!!!