In Comparison to the Amount of Atmospheric Oxygen Inhaled in a Normal

question 29

Multiple Choice

In comparison to the amount of atmospheric oxygen inhaled in a normal breath, one breath of pure oxygen from a tank provides how much oxygen?

• A)five times as much
• B)twice as much
• C)half as much
• D)one-fifth as much

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Definitions:

Groundwater

The subsurface water that occupies the pore spaces in soils and rocks, serving as a major source of fresh water for many areas.

Seas Saltier

A condition resulting from the evaporation of ocean water, which increases the concentration of salts, making the seas saltier.

Quartzite

A hard, metamorphic rock formed from quartz-rich sandstone that has undergone heat and pressure transformations.

Weather

The state of the atmosphere at a place and time as regards heat, dryness, sunshine, wind, rain, etc.