Level 2
Level 3

Energy


20 words 0 ignored

Ready to learn       Ready to review

Ignore words

Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.

All None

Ignore?
combustion
burning
a reservoir
a place where a liquid is stored
solar
relating to the sun
a component
one part of a whole
an emission
a substance discharged into the air
to convey
to transport from one place to another
discretely
separately, distinctly
a nucleus
a central or essential part
to permeate
to spread or flow throughout
to dispose of
to get rid of
to rotate
to turn around, to take turns
a source
a point of origin
to trigger
to initiate
a constraint
a restriction
a contamination
addition of a germ or hazardous substance
to deplete
to decrease the supply of a resource or material
elementally
in terms of elements; basically
an extinction
complete disappearance
to shrink
to become reduced in size
stable
firm and dependable
Level 4