9 mnemonic devices in this subject.
- "Could Oil Stop Driving Cars?" Plus, "Tires Jam Cars Through Quakes."
- Boys Can't Pass Social Studies Class
- Can Oscar See Down My Pants Pocket?
- Older Deer Play Together Cautiously
- Olivia's Parrots Actually Bite, So Pull Finger – Move Quick!
- Order of geological time periods
- Pigeon Egg Omelets Make People Puke
- Pretty Polly Makes Cookies
- True Geologists Climb Faults And Observe Quarries To Contemplate Deformation