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Does anyone know the difference between American Hornbeams and Eastern Hophornbeam leaves? Just wondering haha, thanks! So, the best way to tell the difference is if you are lucky enough to be given the fruit. Hophornbeam has these papery things that look like hops, while Hornbeams have a leafy-fro...

What is the weirdest/hardest experiment you have ever conducted in Experimental Design? Well, I'd say weirdest would be the one where we were given LIVE MEALWORMS and compared the surface they were crawling across to their speed. I didn't know we could be given live animals... Hardest is a manner o...

can you get reference books any where besides the library? :?: :?: :?: I would try checking with teachers in your school- they may be willing to loan you some. Also, try online, you can often get used textbooks and reference books for a discounted price. That means that you can then write in them. ...

yeah the advice above is great. oftentimes one of the hardest things (for me, personally) was managing time. Generally, allot 5 minutes or so to devise an experiment. THEN start working. This could save a lot of time because you know everything you need to do. Our team personally splits the roles i...

General rule of thumb: this event is about being able to design, run, and write up an experiment in a set period of time. From experience, the best way to practice is to grab some objects, get ahold of a rubric, and run your practice like a competition environment. Try dividing up the different sect...

Why is it that on the 2012 sample test there is stuff about hormones relating to the digestive system while on the requirements this year, there is nothing about them? Are the requirements different for every year even if the system is the saem? The requirements, while they may undergo slight chang...

What would happen if someone with a monosomy reproduces with a normal person? Would the offspring have developmental disability as a result of the missing genes? I'm just curious. It would depend. Say the person has monosomy 18. When they do meiosis, producing the sperm/ovum, the chromosome pairs a...

@ EAtBaBAna- standard seems to be use a ratio, unless it asks for something different. As far as mutations, our best guess (especially at B) is that you won't need too much depth for any of them. I'd know some common diseases (Trisomys, Monosomys, and some of the major inheritable diseases), what ca...

What are the biases and errors that we had to know? Confounding error is the one that I see the most frequently. Other than that, it usually seems to be more along the lines of "identify some potential sources of bias/error in this study" or something along those lines. Even those are ver...

I have seen XPD tiered based on "Not Following the Experiment Provided." ie, if the supervisor says that they want an experiment based on mechanical advantage, you'd best make your experiment about mechanical advantage or you may find yourself tier-2'd. That being said, if you are given a ...