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[A new interlinear poem will be available each Monday: Weekly Interlinear Poem .]
Use the dictionary, the acronym finder, and the word origins dictionary (links above) as needed. A new quiz is available each Monday through Thursday. This is the quiz for October 20.
In 1896, Antoine Henri Becquerel (died 1908) accidentally discovered radioactivity. Becquerel wrapped a phosphorescent substance in photographic plates and black material in preparation for exposing them to sunlight. However, prior to actually putting them in the sun, Becquerel found that the photographic plates had been fully exposed. It was the phosphorescent substance that had exposed them.
Describing his method to the French Academy of Sciences in 1896, he said, "One wraps a photographic plate in two sheets of very thick black paper. One places a slab of the phosphorescent substance on a sheet of paper, on the outside. When one then develops the photographic plate, one recognizes that the silhouette of the phosphorescent substance appears in black on the negative. If one places a piece of money between the phosphorescent substance and the paper, one sees the image of the money appear on the negative. One must conclude that the phosphorescent substance in question emits rays which pass through the opaque paper."
In 1903, he shared the Nobel Prize in Physics with Pierre and Marie Curie "in recognition of the extraordinary services he has rendered by his discovery of spontaneous radioactivity".
1. The Greek origin of photo- (as in photographic) meantA. picture.2. Phosphorescent means
D. light.A. bright.3. The discovery of radioactivity was
B. emitting light without appreciable heat.
D. hot.A. accidental.4. Becquerel's discovery depended upon
B. a group discovery.
C. a discovery of the Curies.
D. a discovery of the French Academy.A. phosphorus.
C. photographic plates.
The information comes from Wikipedia.
Write down your answers and then see Answer Key below.
Answer Key: 1-D..........2-B..........3-A..........4-C
Corrections? Questions? Comments? E-mail Robert Jackson at firstname.lastname@example.org.