An Umbrella Tends to Move Upwards on a Windy Day

question 27

Multiple Choice

An umbrella tends to move upwards on a windy day principally because

• A) air gets trapped under the umbrella, warms, and rises.
• B) air pressure is reduced over the curved top surface.
• C) buoyancy increases with increasing wind speed.
• D) all of these

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Definitions:

Voting Rights Act

A landmark piece of federal legislation in the United States that prohibits racial discrimination in voting.

Voter Registration

The process by which eligible citizens sign up to vote in elections, often a prerequisite for being able to cast a ballot.

Southern States

Refers to the states in the southeastern region of the United States, historically characterized by agricultural economies and were part of the Confederacy during the Civil War.

De Jure

Latin for "by law," it refers to something that exists by legal or official establishment.