Each Summer, a Large ʺDead Zoneʺ Devoid of Fish and Other

question 1

Multiple Choice

Each summer, a large ʺdead zoneʺ devoid of fish and other animals develops where the Mississippi River flows into the Gulf of Mexico. What causes this?

• A) Large quantities of fertilizer run off from Midwestern farm fields into the Mississippi River.
• B) Acid rain makes the gulfʹs water too acidic to support fish.
• C) High levels of pesticides are used in the Mississippi River basin.
• D) There are high levels of mercury in the river water.
• E) Global warming is making the river water too hot for the fish to tolerate.

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Definitions:

Speed of Light

A fundamental physical constant representing the maximum speed at which all energy, matter, and information in the universe can travel; approximately 299,792 kilometers per second in a vacuum.

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A hypothetical concept suggesting an unlimited or inexhaustible source of power.

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The developing brain of an individual in the teenage years, marked by significant growth and changes.

Risk Taking

The act of engaging in behaviors or decisions that have a potential for undesirable outcomes in pursuit of a desired result.