Crossword puzzle clue "earth scientist's prefix"

Here are the possible solutions for earth scientist's prefix clue

Answer
Clue
Relevancy
geo
Clue
Earth scientist's prefix
Definition
a gully or creek, also GIO, GOE
element
Clue
Earth, wind or fire, to an early scientist
Definition
a substance that cannot be separated into simpler substances by chemical means
arne
Clue
___ Saknussemm, discoverer of the center of the earth in "Journey to the Center of the Earth"
eco
Clue
Earth-friendly prefix
Earth Day prefix
Appropriate prefix for Earth Day
Prefix that suggests "Earth-friendly"
Prefix for Earth-friendly things
Definition
(short for) ecology

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