premise: geothermal energy is a renewable resource sent2: nevada contains many active fault lines sent3: energy formed by magma heating earth's crust is emitted along fault lines sent4: geothermal energy is formed by magma heating earth 's crust sent5: a source of something emits / produces / generates / provides that something sent6: if something contains many of something else then that something else is common in that something.
hypothesis: the respiratory system takes in oxygen from the air to be moved by the circulatory system