Question 2: This geothermal energy originates from the
original formation of the planet, from ________ of minerals, and
from solar energy absorbed at the surface.
Question 8: [3]
As of 2004, five countries (El Salvador, Kenya, the Philippines, Iceland, and ________) generate more
than 15% of their electricity from geothermal sources.
Question 10: They may be further
augmented by fluid circulation, either through magma conduits, ________, hydrothermal circulation or a
combination of these.