| The first president to occupy the White House was John Adams
in 1800. |
| |
The four U.S. presidents faces on Mount
Rushmore's are George Washington, Thomas Jefferson, Theodore
Roosevelt, and Abraham Lincoln. Gutzon Borglum was the American
sculptor responsible for Mount Rushmore.
 |
| |
| The periodic table of elements was devised by a
Russian chemist named Dmitri Ivanovich Medeleyevin in 1889.
He was nominated for the Nobel Prize for chemistry in 1900,
but failed by one vote. |
| |
|
To quickly multiply by 5, divide the
number in two and then multiply it by 10. Often this can be
done quickly in your head. |
| |
|
Mark Twain was the first notable American
author who placed black and white Americans on the same social
rank—Huckleberry Finn |
| |
| 18,645,507 X 5,363,222,357 = 99,999,999,999,999,999 |
| |
| A year, 365 days, is the time it takes for the Earth to travel
around the Sun. A day, 24 hours, is the time it takes for the Earth
to spin around once on its axis. |
| |
| Albert Einstein (1879-1955) was the principal
founder of modern theoretical physics. |
| |
 |