The Major Source of Free Oxygen in the Atmosphere Is

question 24

Multiple Choice

The major source of free oxygen in the atmosphere is from ________.

• A)molten rock
• B)water
• C)green plants
• D)silicate minerals
• E)glaciers

---

Definitions:

Back-Arc Spreading

The formation of new oceanic crust behind a volcanic arc, resulting from the divergent movement of plates at a convergent boundary, a reiteration emphasizing plate tectonic mechanisms.

Mesozoic Jurassic

A geologic period within the Mesozoic Era, known for the dominance of dinosaurs and the presence of significant geological and climatic changes.

Thrust Sheets

Large sections of the Earth's crust that have been moved horizontally over other rocks by tectonic forces.

Ocean Floor

The bottom surface of an ocean basin, consisting of various geological features including trenches, volcanoes, and flat plains.