YungMihi wrote:Hey anyone have any good resources for soil id, pollen, and ento? These topics haven't really come up in the states or regionals tests but I feel like they will at Nats.
ET2020 wrote:Can someone please clarify what concentrations of liquids will be used? The rules just say "10% NaCl, 46% isopropyl alcohol" etc without specifying whether it is percent by mass or volume. Also many of the old nationals test provide solution concentration and density, but their numbers don't make sense to me. For example one test says "46% isopropyl alcohol: 0.95 g/cm^3). The problem is that 46% iso by mass has a density of 0.88, while by volume has a density of 0.90. Does anybody know if we can get clarification on this?
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