analyze
balance
boundary
capacity
catastrophy
characterize
circulation
composition
concept
consequence
converge
cycle
deduce
depletion
describe
determine
discern
discriminate
distinguish
distribution
dynamic
element
emit
empirical
energy
evidence
evolution
feature
front
function
identify
impact
infer
influence
internal
mechanism
mitigation
observation
origin
parameter
pattern
predict
primary
principal
process
relationship
relative
reservior
sequence
shift
significant
structure
system
texture
theory
transfer
trend
variation