By studying Earth' geological changes, volcanoes and earthquakes with the geology learning children science kit by Thames & Kosmos, you can learn more about the inner workings of Earth. Earth is constantly changing. Massive pieces of its outer layer are slowly sliding under, over, away from, or past each other. Earthquakes shake the continents and oceans, and volcanoes spew out the molten insides of our planet. By studying these awe-inspiring and devastating natural phenomena with the Volcanoes & Earthquakes..