From Where Did the Oxygen in the Earth's Atmosphere Originate

question 21

Multiple Choice

From where did the oxygen in the earth's atmosphere originate?

• A) photosynthesis from plant life and single-celled organisms
• B) chemical reactions between gas in the upper atmosphere and the solar wind
• C) outgassing from volcanoes
• D) atmospheric bombardment
• E) oxidation of surface rocks

---

Definitions:

Say's Law

A principle that asserts supply creates its own demand, suggesting that producing goods and services generates the means and willingness to purchase other goods and services.

Economy Produces

Refers to the total output of goods and services generated by an economy within a specific period.

Real Balance Effect

The influence a change in household purchasing power has on the quantity of real GDP that consumers are willing to buy.

Depression

A severe and prolonged downturn in economic activity, characterized by significant declines in GDP, high unemployment, and deflation.