The Molecular Oxygen in Earth's Present Atmosphere Was MOST Likely

question 175

Multiple Choice

The molecular oxygen in Earth's present atmosphere was MOST likely produced

• A) at the formation of Earth and has always been present.
• B) from volcanic eruptions as the primitive Earth cooled down.
• C) from volcanoes, by outgassing.
• D) by biological activity such as photosynthesis from green plants.

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Definitions:

Variable Manufacturing Overhead

Costs that fluctuate with the level of production, such as utilities or indirect materials, but are still related to the manufacturing process.

Machine-Hour

A unit of measure representing an hour of operation of a machine, used in calculating manufacturing costs and overhead rates.

Fixed Manufacturing Overhead

Costs associated with the production process that do not vary with the volume of production, such as factory rent.

Variable Overhead Efficiency Variance

The difference between the actual variable overheads incurred and the standard cost of those overheads for the actual production level.