The MOST Common Elements in the Universe Are

question 33

Multiple Choice

The MOST common elements in the universe are

• A) about equal amounts of all elements up to iron but very little of any heavier elements.
• B) hydrogen and helium, with small amounts of heavier elements.
• C) nitrogen and oxygen, with smaller quantities of hydrogen, helium, and heavier elements.
• D) heavy elements, with smaller quantities of hydrogen and helium.

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Definitions:

Neustonic

Pertaining to the thin surface layer of an aquatic environment where organisms may float or swim.

Experience Turnover

The rate at which employees leave a workplace and are replaced by new personnel.

Brittle Stars

Ophiuroidea, a large class of echinoderms that are characterized by their long, slender, and often highly flexible arms, which distinguish them from starfish.

Benthos

Bottom-dwelling sea organisms that fix themselves to one spot, burrow into the sediment, or simply walk about on the ocean floor.