User:Mrgreencacti

Mrgreencacti was a student at Jeffrey Trail Middle School in the 2016-2017 and 2017-2018 years. He joined Science Olympiad in his 8th-grade year (2017-2018) and was on the "Blue Team," or competition team for all competitions. He was part of the first generation of students at Jeffrey Trail to win first place in the Southern California State Tournament and advance to the National Tournament.

In the 2018-2019 year, he tried out and got onto the Portola High School Science Olympiad team as a freshman along with a lot of his other Jeffrey Trail peers. From there, he was chosen to be on the main competition team (the "A Team") for the 2018-2019 and 2019-2020 years, where he remains currently. At the moment, he is preparing for the rest of the competition season.

Jeffrey Trail wins first place in Southern California in 2018. Which one is Mrgreencacti?

Mrgreencacti poses with the rest of the Portola Science Olympians at the start of the 2018-19 season.

All Events

8th grade - 2017-2018

Competed In	Did Not Compete In
Battery Buggy (filler)	Dynamic Planet (filler)
Hovercraft	Experimental Design
Thermodynamics	Solar System

9th grade - 2018-2019

All
Circuit Lab
Fermi Questions
Thermodynamics
Wright Stuff (filler)

10th grade - 2019-2020

All
Circuit Lab
Experimental Design
Machines
Sounds of Music

Placings

8th Grade - 2017-2018

Competition	Hovercraft	Thermodynamics	Battery Buggy
Kraemer Scrimmage	5th	2nd	_
Ladera Vista Invitational	2nd	14th	_
Mesa Robles Invitational	3rd	3rd	_
Kraemer Invitational	3rd	5th	3rd
Regionals	4th	1st	1st
State	10th	2nd	9th
Nationals	7th	3rd	23rd

Note: From this point forth, Mrgreencacti will not have any placings at nationals because Troy exists.

9th Grade - 2018-2019

Competition	Circuit Lab	Fermi Questions	Thermodynamics
Portola Scrimmage	1st	1st	1st
Mesa-Wilson Invitational	3rd	3rd	15th
Polytechnic Invitational	3rd	4th	1st
Regionals	5th	14th	3rd
State	10th	3rd	5th

10th Grade - 2019-2020

Competition	Circuit Lab	Machines	Sounds of Music
SOLVI at Clark	8th	11th	1st
Polytechnic Invitational	_	_	_
Regionals	_	_	_
State	_	_	_

Event Description and Experience

This section goes over the experience that Mrgreencacti had in each of his main events.

Hovercraft

Mrgreencacti was in Hovercraft in 8th grade. He chose hovercraft mostly because the name sounded cool to him at the time. He started off learning the basics of what was on the rules and was taught by a certain unnamed mentor kinematics and collisions. This was his first exposure to physics. Around the same time, a hovercraft demonstration was done by a more experienced science Olympian. At the time, he mostly thought that it was loud.

Having been second best in weekly testing for the study portion of the event, Mrgreencacti was chosen to be on the blue team for Hovercraft. He continued to study the mechanical physics involved with the event, writing numerous practice tests and compiling the team's binder. He also spent many hours afterschool with his partner (who actually built the hovercrafts), testing, mainly for balance, arranging the penny stacks and bolts in different positions so that the hovercraft travelled the distance of 60 cm at around the target time of 15 seconds. It was frustrating work -- the hovercrafts were inconsistent in their performance, which varied greatly depending on the level of the batteries, which, upsettingly, ran out of power very quickly and had to be recharged frequently.

At his first ever invitational at Ladera Vista, Mrgreencacti (with the help of his partner) earned his first ever medal -- 2nd place. From there, they placed at every competition except for state (bad luck) and nationals (7th place!).

Thermodynamics

Mrgreencacti did Thermodynamics in 8th and 9th grade. Thermodynamics was the first event that Mrgreencacti built something for, as Thermodynamics was a hybrid event, with both a study portion, and a build portion.

Originally, Mrgreencacti chose this event also because the name sounded cool. He started to study the topics involved, such as heat transfer, phase change, temperature, heat, and even things he had never heard of before, like entropy. At the same time, he and another science Olympian started to work on the build portion of the event (separately). At the time, Mrgreencacti reasoned that it would probably be easier to make a stationary insulation box than a working, complicated hovercraft. He tested all sorts of materials and judged their performance during 30-minute tests, comparing the final temperatures of water inside and outside the box. He did this in competition with the other science Olympian, and the two regularly did these 30-minute tests on their own boxes that they filled with materials. These started from cotton balls and Styrofoam and advanced to polyurethane foam and Spaceloft aerogel. By the end, although Mrgreencacti's box was slightly less good (as proven by tests) than the other science Olympian, because his Kraemer Scrimmage scores were higher, he was chosen to compete in Thermodynamics for the Blue team, with another science Olympian who was a god at the study portion of the event.

At the first invitational, Ladera Vista, Mrgreencacti accidently did a construction violation. The polyurethane foam had expanded to above the height limit for the box, and pushing it down counted as a "modification." So they got 14th place and Mrgreencacti feared he would be kicked off the team. However, he stayed on the team and continued to place at all the invitationals and regionals.

By this point, the design for the box had been set in stone. A plywood box with layers of polyurethane foam inside, Spaceloft aerogel inside that, and reflective aluminum tape adjacent to the beaker with a polyurethane lid on top. With this box, he did over 200 total 300-minute tests, testing within the parameter ranges for temperature -- 60-90 degrees Celsius and 50-150 mL of water. After regionals, he devised a plan for the ice water bonus, which he would only use if the volume of water and initial temperature were significantly high enough to make a positive heat score tradeoff. This was tedious, and it was inconsistent throughout the entire process.

At state, Mrgreencacti and his partner got 2nd place, one-upping Kraemer Middle School. At nationals, they got 3rd place, and this will remain Mrgreencacti's first and last nationals medal ever. Memorably, their prediction for final temperature was only 0.6 degrees off; however, Kennedy claimed theirs was 0.1 off. Kennedy won 2nd.

Mrgreencacti continued with Thermodynamics in 9th grade. He developed a new method to predict final temperature -- using Newton's Law of Cooling and the exponential decay model that came with it. He did over a hundred tests and determined the k-value for cooling at different volume parameters (75-125 mL that year) and tested at different initial temperatures (60-75 degrees that year). Mrgreencacti was sad to learn that the ice water bonus that had helped out so much at state and nationals the previous year was not a part of the event that year.

Mrgreencacti also improved upon the design of the previous year. Division C Thermodynamics called for an even smaller box (15x15x15 cm compared to 20x20x20 cm for Division B). He took a thin cardboard box so as to not take up too much volume, and tested various polyisocyanurate (PIR) foams for insulation, eventually settling on Thermasheath from The Home Depot as a replacement for what had been polyurethane (PUR) foam the previous year. The layer of Spaceloft Aerogel stayed, and the lid was made of PIR (not Thermasheath, though) as well.

Mrgreencacti worked together with the original science Olympian from Jeffrey Trail who had been in direct competition with him the previous year and together, they placed at every competition except for Mesa-Wilson. Notably, their prediction for final temperature at state was 0.0 degrees off the actual value, but they still got 5th place.

Trophy History

Note: Trophies shown were earned collectively on various teams that Mrgreencacti was a part of. These are by no means achievements of Mrgreencacti alone.

1st	Mrgreencacti received a 1st place trophy at the 2018 Ladera Vista Invitational Tournament.

3rd	Mrgreencacti received a 3rd place trophy at the 2018 Mesa Robles Invitational Tournament.

1st	Mrgreencacti received a 1st place trophy at the 2018 Kraemer Invitational Tournament.

2nd	Mrgreencacti received a 2nd place trophy at the 2018 Orange County Regional Tournament.

1st	Mrgreencacti received a 1st place trophy at the 2018 Southern California State Tournament.

9th	Mrgreencacti received a 9th place trophy at the 2018 United States National Tournament.

3rd	Mrgreencacti received a 3rd place trophy at the 2019 Polytechnic Invitational Tournament.

4th	Mrgreencacti received a 4th place trophy at the 2019 Orange County Regional Tournament.