payback./time./-./correct./answer./✔ ✔
the./amount./of./time./it./takes./to./save./enough./money./in./operation./costs./to./
pay./for./equipment
Electrolysis./-./correct./answer./✔ ✔
The./separation./of./water./into./hydrogen./(H2)./and./oxygen./(O2)./through./t
he./application./of./electrical./current.
fuel./cell./-./correct./answer./✔ ✔ An./electrical-
chemical./device./that./converts./fuel,./such./as./hydrogen,./into./an./electrical./c
urrent.
Surface./Mining./Control./and./Reclamation./Act./of./1977./-./correct./answer./
✔ ✔
(1977)./Requires./mining./operators./to./restore./land./to./a./condition./capable.
/of./supporting./the./uses./it./could./support./prior./to./mining,./or./to./support./"hig
her./and./better./uses"./like./prisons./and./big‐box./retailers.
fluidized./bed./combustion./-./correct./answer./✔ ✔ a./clean-
coal./technology./in./which./crushed./coal./is./mixed./with./limestone./to./neutral
ize./the./acidic./sulfur./compounds./produced./during./combustion
,Synfuels./-./correct./answer./✔ ✔
Synthetic./gaseous./and./liquid./fuels./produced./from./solid./coal./or./sources./
other./than./natural./gas./or./crude./oil.
Bitumen./-./correct./answer./✔ ✔
A./degraded./petroleum./that./forms./when./petroleum./migrates./to./the./surfa
ce./of./Earth./and./is./modified./by./bacteria.
Passive./vs./Active./Solar./Heating./-./correct./answer./✔ ✔
Active./uses./a./series./of./collection./devices./mounted./on./a./roof./or./in./a./fiel
d./are./used./to./gather./solar./energy,./whereas./passive./does./not
Photovoltaics./-./correct./answer./✔ ✔
a./method./of./converting./sunlight./to./electricity./using./layers./of./materials./t
hat./either./readily./give./up./or./absorb./electrons.
Schistosomiasis./-./correct./answer./✔ ✔
A./disease./caused./by./parasitic./blood./flukes./(schistosomes),./acquired./thr
ough./contact./with./unfiltered./tropical./or./subtropical./fresh./water
Hypothermal./resevoir./-./correct./answer./✔ ✔
Large./underground./reservoir./of./hot./water./and./possibly./also./steam;./som
e./of./the./hot./water./or./steam./may./escape./to./the./surface,./creating./hot./spring
s./or./geysers.
, Nuclear./fuel./cycle./-./correct./answer./✔ ✔
The./processes./involved./in./producing./the./fuel./used./in./nuclear./reactors./a
nd./in./disposing./of./radioactive./(nuclear)./wastes.
General./Mining./Act./of./1872./-./correct./answer./✔ ✔
Governs./the./transfer./of./rights./to./mine./precious./metals./and./other./hardro
ck./minerals./from./federal./lands
Minerals./-./correct./answer./✔ ✔
A./solid./inorganic./substance./of./natural./occurrence.
Three./types./of./rocks./-./correct./answer./✔ ✔
igneous,./sedimentary,./metamorphic
magmatic./concentration./-./correct./answer./✔ ✔
as./magma./cools./heavier./elements./settle
hydrothermal./processes./-./correct./answer./✔ ✔
minerals./are./carried./and./deposited./by./water./heated./deep./in./earth's./crust
overburden./-./correct./answer./✔ ✔
soil./and./rock./overlying./a./useful./mineral./deposit