Science Olympiad 2027
Most practice tells you the answer. This tells you why you picked the wrong one — every wrong choice is a mistake people really make, and it says which. Five rungs per topic, the first two free.
What is the term for the rate at which energy is transferred?
A ladder, not a flashcard pile
Each topic climbs five rungs — Remember, Understand, Use It, Reason, then a Challenge set somewhere the sources never went. Hints at every rung, so being stuck is a step rather than a wall.
Wrong answers explain themselves
The wrong answers are built from mistakes people actually make, and each one says what the mistake was. Picking "isothermal" for a no-heat-transfer question tells you what isothermal really means.
Every question traces to a source
Items are written from a crawled corpus of OpenStax, Wikipedia and U.S. federal agency material, and each one carries the passage it came from. Numeric answers are recomputed and checked before they ship — an item that fails is dropped, not published.
Openly licensed, and no past tests
Sources are Creative Commons or public domain, credited per topic. Nothing here is scraped from the Rules Manual or from tests other schools wrote and own.
Written for Division C depth and shared with Division B. 31 of 32 events are written so far — the rest are marked soon rather than left to look finished. See what is ready.