Science Path: Physics, Chemistry, Atomic Structure and Geography
Science is not memorizing conclusions; it is reading the givens, choosing the formula and getting the result. Pick a subcategory and difficulty, ten questions per level, with spaced review. The path covers physics, chemistry, atomic structure and geography; each subcategory has four difficulties so concrete facts and calculations are separated.
物理速度/力/功/电/能量，4 个难度。4000 关化学元素/离子/同位素，4 个难度。4000 关原子结构质子/中子/电子，4 个难度。4000 关地理国家/首都/代码/时区，4 个难度。4000 关
How it works
- Pick physics, chemistry, atomic structure or geography.
- Each has four difficulties.
- Ten questions per level; points unlock the next.
FAQ
How many levels?
16 difficulties x 1000 levels = 16000 levels.
Which exams?
School science exams and contest basics, plus general science.