Final answer:
Geothermal systems are designed to heat up a liquid for heating or hot water use. This can be done by tapping into heated groundwater through wells and driving generating turbines to produce electricity. The hot water can also be used to circulate heat in buildings.
Step-by-step explanation:
Geothermal systems are designed primarily to heat up a liquid that is used for heating or hot water use. Groundwater heated by underlying magma can be tapped through wells and brought to the surface, where it can drive generating turbines and produce electricity. Hot water from geothermal sources can also be circulated to heat buildings.