3.Geothermal Activity: – Hot spring forms when groundwater heated by a nearby body of magma rises to the surface and collects in a natural pool. – Geyser is a fountain of water and steam that erupts from the ground (when rising hot water and steam become trapped underground in a narrow crack)
5. VOLCANOES IN THE SOLAR SYSTEM Earth is not the only body in the solar system to show signs of volcanic activity. Pictures taken by space probes show evidence of past volcanic activity on Mercury, Venus and Mars (rocky planets) On Mars there are large volcanoes and lava flows. The largest mountain in the solar system is the Olympus Mons volcano (25km height).