Not only that, major glaciations in the distant past have affected the geological record, such as the Snowball Earth episodes ~ 700 Ma ago that nearly eradicated a billion years of stratigraphy.

This biggest event of all is a meteor impact, which can cause tsunamis, fires, etc. and also introduce new material to Earth.

Perhaps overlooked on your list is the affect that life has on geology: from microorganisms and worms in the soil creating humus to larger animals that burrow and dig, to vegetation that can transform local soil, moisture, and temperature... plants and animals do make a difference.

Finally, I know you said you will talk about people's influence later, but make sure they know we are in a new geologic epoch, the anthropocene. And, while human influence on climate is very important, we are possibly causing a bigger geologic effect with plastic waste.

Technically, #2 is an "oceanographic" process, but it's influence on crustal geologic processes is profound. Processes like the flipping of the poles, the distancing moon, wind erosion are interesting but play little part influencing the bigger geological picture.

Your later lesson might include how human-caused global warming is affecting global ocean currents and disturbing stable processes reflected in the geochemistry at plate boundaries. You might tell your kids how 25 million years from now, a terrestrial-squid geology grad student may study the relationship between the sudden disappearance of carbon-rich andesites from the western South American plate and the anthropocene.

Incidentally, if you'd like to show your students some riveting "future-geology", I highly recommend the series "The Future is Wild", in which global geology (and evolution) is observed 5, 100, and 200 million years into the future.