Відео

...?

Not only Chinese but the whole Asian community is so hardworking...

​@@kinjalsingh7256indeed.

Still born educated and coached in USA They are Americans

@@chaitalichatterjee4742 Basically theyre chinese americans that all receive gold medals

@@chaitalichatterjee4742 , yes, they are American

Theyre american no doubt

They all are Chinese

@Azazel-_xl lol not

@Azazel-_xl no

@Azazel-_xl no need to be pretentious not everything revolves around you 🤣

same!

@@dheerbaldua9490 wish you luck!! See you this summer hopefully 🤞🤞

Great question! Of course, there has been much study done on the past 300 million year span you reference and link between atmospheric carbon dioxide levels and warming of the atmosphere and/or biosphere. There are a few main points that have been elucidated in publications such as 'Carbon dioxide and climate over the past 300 Myr.' (Retallack, 2002), the findings of a NSF-granted study. tinyurl.com/y2camqsk In essence, a majority of that carbon was used by thick-cuticle, large-stoma plants that were sensitive to carbon dioxide levels, particularly species of ginkoes, which reached a maximum of 11 in the Cretaceous period (note: there is only one extant species of ginkgo today: Ginkgo biloba). Also, the oceans, as you likely know, are and were a huge carbon sink, not only through consumption of carbon dioxide by phytoplankton, but also because, as in air, carbon dioxide is a heavy gas that sinks in a deep, cool-water, relatively "still" ocean. Flora and Fauna: Climate Change in Context The Mesozoic (Age Of Cycads And Dinosaurs) tinyurl.com/y49datz5 However, as was noted in a comparison of the 1990s - 2000s, geological and atmosphere patterns that stir ocean currents (think hurricanes and plate shifts (underwater earthquakes), for example), can cause upwelling of carbon dioxide. Also, the warming of the ocean can cause the gas to rise, which indicates a temperature-carbon dioxide saturation "coupling." The question has been raised, then, if the ocean is a greater carbon dioxide sink than all of the forests in the world, and carbon dioxide levels have been 2-5 times greater in the past than they currently are, why are humans concerned with a warming climate? Firstly, there are numerous (at least 4 confirmed) extinction events during the referenced 300 million year time after which high carbon dioxide levels followed. Why followed? Ahhh... the rising temperatures mammal migration, and particularly marine extinctions. This is summed up quite well by Retallack (2002): "...tropical marine palaeotemperatures above 25 ◦C are not compatible with high biological diversity. Or, as put more colourfully by Lovelock (2000), Earth’s biota is sick when it runs a high temperature." In conclusion, comprehensive comparisons of carbon dioxide stomatal index studies to isotopic oxygen data as a proxy for paleotemperatures do in fact support a coupling between carbon dioxide levels and planetary temperature. While millions of years ago, the planet had centuries, if not millenia, to adjust to global extremes (caused primarily by volcanic activity), humans are now producing more carbon dioxide than all of the volcanoes on earth, and biological processes, particularly adaptation simply cannot keep up. Even if we presumed humans could migrate to cooler regions, studies of million(s)-year-history of carbon dioxide rise and associated temperature rise, which directly affects the atmosphere and weather processes, which cycle back to carbon dioxide rise (thus, climate change, not just 'global warming), indicate that mass mammalian extinction would inevitably follow. Dinosaur Era Had 5 Times Today's CO2 By Katia Moskvitch - SPACE.com Contributor March 24, 2014 tinyurl.com/yde5u3ly Scientists solve ocean ‘carbon sink’ puzzle Robert McSweeney August 2, 2017 tinyurl.com/y6axw29t

Thank you for your patience in our reply. Scores were posted approximately one month ago; unfortunately, as I'm sure you now know, RSI in its traditional form has been cancelled for the 2020 summer session due to the host location, MIT, cancelling summer programs for the health and safety of students and staff. For more information, visit: www.cee.org/events/2020-rsi-mit-canceled.

Center for Excellence in Education Thank you for your reply! I understand the situation for this upcoming summer was necessary. However I am having trouble finding the scores for the 2019 presentations, could you potentially send me a link to it?

@@dr.football5449 Thank you for your clarification. While I cannot provide you with that list through this venue, I suggest you visit www.cee.org/news/rsi-welcomes-82-top-scholars-2019-summer-stem-institute, where you'll find a list of all 2019 scholars. If you need more specific information, please use the contact information for the Executive Vice President, Maite Ballestero, at the bottom of the page. She may be able to provide the details you seek. Thank you for your understanding!