Category: Science

Science Filtration Process

Around  the beginning of February my class and I began reading the book, A Long Walk to Water by Linda Sue Park.

Image result for A long walk to waterThe book was split into two different stories. One story was in 1985 and it was about a boy named Salva. The other story was in 2008 and it was about a girl named Nya. In Nya’s household water was scarce so everyday she had to walk back and forth from sunrise to sundown just to get water. Even though she walked so long to get the water, the water was still very dirty and probably not the safest to drink either. We also read the book, Salila’s Turtle by Engineering is Elementary Team. Salila was working hard on trying to filter water. This inspired my class to start looking into pollution and how pollution forms. We realized most and/or all the pollution is caused by humans. Since lots of people don’t have a water system in there home they use ponds, lakes and oceans to “tidy” themselves. This causes water to have lots of contaminants.

My class was split into groups. My group was Max and Jessica. Our goal was to find a way to make a useful filter but we had to move in small steps. First, we brainstormed the criteria for determining the quality. These are the ones we came up with,

  • Number of particles left behind
  • Clarity
  • Taste
  • Odor
  • Color
  • Speed
  • Durability

After, it was our first time filtering water. We were only allowed to use each filter by itself. We did this to see what each filter could do by itself. We were given paper filters (coffee filters), sand and gravel and a screen (mosquito net). We were looking at how many particles the filter could remove, how much color the filter removed, and how long it took. We also were assigned to a bottle full of a contaminant. My group got assigned to soil water. Then, we filtered the water with the three filters we had. We found that the sand and gravel worked the best. It didn’t take that long but it could have been faster. It took about 2 minutes. I think it took so long because the holes that water seeped through were so small but that’s also why I think the water was filtered so well. Finally it was time to really start thinking about the criteria we needed to make a good filter. Our class thought of these.

  • Reusable
  • Hardy
  • Strong
  • Durable
  • Easy to use
  • Efficient
  • Safe for environment and kids
  • Portable
  • Inexpensive
  • Long lasting
  • Easy use for kids
  • Good quality

Before we started,

2 groups got paired together. (I think we did this to make things easier.) Our teacher asked us to find the top 4 criteria that we wanted our filter to be based off of. We chose safe for all ages, reusable, efficient, and good quality. Then, we started thinking about materials to use. Our teacher said every single idea should be written down no matter how weird it is. Here is the a list.

  • Elephants trunk
  • Pink fluffy unicorn
  • Layered paper filter
  • Medal
  • Soybean powder
  • Self contained tank
  • Cheap thin fabric
  • Dried and washed non toxic baby wipes, stretched out

In the end our materials for our first filter were,

  • Non toxic baby wipes
  • Paper filter
  • Folded screen
  • bottle

We made the filter like this, we put the folded screen in the bottom of the bottle then, we put 5 paper filters right on top, and lastly we taped the baby wipe to the top of the bottle. We also had a rating system. 5 meant super bad and dirty water, 4 meant a little bit lighter and still a lot of particles, 3 meant pretty clear and just a couple particles, 2 meant almost completely clear and very little particles, and 1 meant completely clear water.

Before we started to filter our water we had to answer some question in our note book. Here is a picture of what it looked like.

Then, finally we were ready to filter our polluted water. Our first attempt took about two minutes which isn’t bad. It was a 2 ½ because there were not many particles but the color was in between the two. We thought it was really good for our first try.

Our 2nd attempt went the exact same but we went with a different design. This design was a little bit more sophisticated. Here are the materials we used.

  • Folded screen
  • 5 Paper filters
  • Non toxic baby wipe (we put the baby wipe inside the paper filter)
  • Sand and gravel

Our 2nd try we also think it got a 2 ½ because the color was in between and there was a little amount of particles left. Since our end product turned out being the same we wanted to see what would happen if we filtered it again. (we double filtered it). The color didn’t change but there were no particles at all. We came to a conclusion and said that the rating was a 2. I think if we filtered the water 5 times it would be a one but we didn’t have time.

Our last attempt was the the worst and the best in different ways. These are the materials we used for our last design.

  • Folded screen
  • 5 paper filters
  • Flattened out cotton balls
  • Sand and gravel
  • Non toxic wipe

Our last filter was weird because after we filtered the water there were absolutely no particles in it that were visible but yet the color was still very dark. This is confusing to me because i thought that the cotton balls would take most of the color out but it didn’t. But i do think that the cotton balls helped with making the water have no particles.

Overall, I would definitely do this again at home because it is a fun project but it can also help stop pollution.

Launch #1

10/23/17 we launched our rockets. Looking at the graph, J.E.X.L. launched the highest at 57.5m and Blasting Rockets launched the lowest at 20m. The difference the two is 37.5m. My group, Science Minds, launched at 51m this 9.5m higher than the class average.

Before we got onto the field, we made sure that we had everything in the supply cart. Then, we started to walk out to the field. First, we set up the launch pads. Then Mrs. Boyer (our teacher) set up the safety area. We put all of the other supplies at the end of the safety zone. When I saw all the rockets go before mine, it was so astounding how high they went. When my group was up, we filled the rocket with water. Next, we slid it onto the launch pad and made sure that we set everything up right. Then my teammate and I started to pump. In the beginning, it was easy to pump but the last few pumps were a lot more difficult. After we finished pumping the launch master called out the clinometer readers to make sure they were ready. Then the countdown began 3, 2, 1! There the rocket went, blasting up high. It came down on the nose cone but luckily nothing broke. Another thing I did was clinometer reading. It was basically where I would estimate the measurement of how the rocket went with this little contraption.

Before launching the rocket, I was nervous because I didn’t think my rocket was going to go high. I was also worried that one of the rockets was going to fall on my head and that when my rocket landed it would fall apart and we would have to start all over again! But, I also had hope that our rocket would go high because I thought my group and I prepared it well. After we launched our rocket I was very happy and excited about the results. I thought it went really well because nothing fell apart and our rocket went straight and super high.

Something I think my group and I could have done better was our nose cone. The quality was good but it was a bit too big so it caused air resistance. Away we could fix that in the future is if we put glue to cover the space so it works as an air blocker. Another option is to just print a new one. Another thing we could fix is the wings. We could glue two together so they are less delicate. It would help us in the process of the building because the wings won’t snap anymore. A downside to that is that may be making the rocket over it preferred weight limit. I don’t think we have to change much because it went really well the first time.

Thinking ahead I think when we start redesigning our rocket we will be much more delicate with everything so nothing breaks. I hope the minor changes my group makes will make a great impact on the rocket and it will make it 10 times better. A question I have for next time is, will something will go wrong with my rocket? Another question is, will anything break?

Overall, I think the launch went as planned or even better. I hope next time goes even better than last time.

Rocketry project (preparing and building)

We have started to build our rockets. We are also are preparing for the launch and how to measure how high the rocket goes. Today (10/17/17) we started learning how to measure things in motion. We used a trendall wheel to tell us we were 15m away from the flagpost or soccer ball. First, we measured a flagpost I found this to be easy because it wasn’t moving and we had multiple tries. Next, we threw the ball in the up in the air. We had to try to measure the highest point that it went. I found this to be tricky because we had limited tries and it wasn’t so as accurate as the flagpole. I think when we have to measure the rocket it will be very hard because it goes very fast and we only get one try so our measurements might be totally off.

For our building, it was pretty easy since we already had our plans. The first thing we had to do was sand our bottles. We had to sand our bottle because if we left it smooth than the hot glue would peel off the bottle. After we finished sanding our bottle we had to cut a strip of paper that was the size of around the whole bottle. Then we had to fold the paper into four even sections. Next, we had to tape the strip around our bottle and extend the lines onto the bottle.

Then we decorated our fins, we had to make sure we left aside without tape so the glue wouldn’t slide off of it. That was a big problem for us because we weren’t thinking about that when we started. So we had to try to peel some of the tape and cut some of it off. Two of them worked two of them failed. We re-started the ones that failed and they ended up looking really good. Next, we decorated the top of the bottle with tape. We only decorated the top of our bottle because we didn’t want to cover up the sanded part. After that, we hot glued the wings onto the sanded sides of the bottle and made sure we did extra glue so it would for sure stay.

For the nose cone, my teacher (Ms. Boyer) contacted the high school and asked them if we could use their 3D printer. A big problem that happened was that we forgot to send our nose cone prototype to her. We solved this problem because Om has a 3D printer at his house, so we are every thankful for that. We are planning to just hot glue it onto the bottom of the bottle and we should be fine. Overall my group and I have a solid build. We still need to finish the nose cone, but other than that we should be good. I think that our build will be very good for the launch I think it is strong and it won’t fall apart too easy.

This is what our rocket looks like we decided to put red tape in between the wings because it was dull without it and now it pops a lot more. We put our team name (Science Minds) on our rocket so it was more customized and personalized.