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A. prize B. finally C. discovered D. express E. wounds |
In October 2019, the finalists met their scientists and other students face to face at 3M's special science center in St. Paul, Minnesota. The students their views in the group, and the winners were announced.
Kara Fan from California won the big for a special liquid bandage she created. It can be sprayed on cuts and . One important part of Kara's bandage is nano –silver (纳米银)—silver in extremely any form. Kara had to do a lot of research to get that part just right. For winning, Kara got $25,000.
