Isotopes and atomic weights. Nuclear power generation and waste disposal - yet another grabber. Erosion and deposition. Ancient Egyptian civilization. Asteroids and comets.
Space is a natural grabber.
Even very young students are fascinated by space and the space program. It can work on its own, or developed from the dinosaur center via the Great Extinction Event. Comets and asteroids have their own special fascination. So do dangerous objects, and spectacular events. Magellan and the Voyagers.