The Scientific Study of the Earth's Structure
This page is the CodyCross answer for the clue below from World of Sounds, Group 1355, Puzzle 1 (Helicopters).
Question is: The Scientific Study of the Earth's Structure
and the answer is: GEOLOGY
Word Meaning:
GEOLOGY — The science that studies the structure of the Earth (or other planets), together with its origin and development, especially by examination of its rocks.
Definitions from Wiktionary.