1. _______ is a filmy substance forming on teeth and gums that encourages harmful bacteria.   Placard   Plague   Plaque   Placenta   Hint Half-n-half Clue   2. If a is the length of the side of a square, its perimeter is _______   2 a   4 a   a2   6 a2   Half-n-half Clue   3. A Heptathlon is an athletic contest in which each contestant participates in _______ track and field events.   5   8   7   6   Half-n-half Clue   4. What are the imaginary horizontal lines seen on a map parallel to the equator?   latitudes   longitudes   meridians   laterals   Half-n-half Clue   5. Which U.S. President was shot and killed in 1963 by Lee Harvey Oswald?   Abraham Lincoln   William McKinley   James A. Garfield   John F. Kennedy   Half-n-half Clue   6. Which agreement ended World War I?   Geneva Protocol   Treaty of Versailles   Emancipation Proclamation   Treaty of Paris   Half-n-half Clue   7. What is the capital of the Philippines?   Manila   Male   Java   Sumatra   Half-n-half Clue