The Large Dead Zone That Forms in the Gulf of Mexico

question 40

Multiple Choice

The large dead zone that forms in the Gulf of Mexico each summer is caused by

• A) phytoplankton.
• B) zooplankton.
• C) algae.
• D) archaebacteria.

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Definitions:

Gram

An alternative definition: A basic unit of weight in the metric system equivalent to approximately 0.035 ounces.

Milliliters

A metric system volume unit that equals one thousandth of a liter.

Liters

A unit of volume in the metric system, equivalent to 1,000 cubic centimeters or approximately 0.26 gallons.

Centimeter

A unit of length in the metric system, equivalent to one hundredth of a meter, used commonly to measure small distances.