Honors Chemistry, Mrs. Reed, Lumpkin County High School
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Element of the Week!
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Aluminum is the most abundant element in the earth's crust. Amazingly, it was displayed near the crown jewels in the 1855 Paris exhibition. First isolated in 1827, the cost to extract it from bauzite ore, an oxide of aluminum, was in excess of $500 per pound. In 1886, an Oberlin College student, Charles Hall, found that by mixing fluoride salts with bauxite at 800-1000 degrees C, aluminum oxide could be electrolyzed to pure aluminum at $2 per pound and less than $.25 per pound later. Aluminum is resistant to oxidation because the oxide coating that quickly forms on its surface will not allow further oxidation. Its low density and resistance to oxidation make it a favoralbe material for cookware. Its alloys make light-weight building material. Crystals of aluminum oxide with various metal impurities result in synthetic rubies and sapphires with unusual hardness. It is also one of the better conductors of electricity.
From: "Element of the Week" by BH3 Reactions
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THIS WEEK'S LESSON:
This is where you type in your lesson for the week! What are we learning about now? Solar eclipses? The Ching Dynasty? Fractions? Russian literature? The Big Bang? Civil rights? The Periodic Table of Elements? Beat poetry? Thermonuclear fission? Gravitational waves? Game theory? Air pressure? Probability? Roy G. Biv? Let's go!
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ASSIGNMENTS:
2/27: Read Ch 1 in your book.
Answer q. 1-5.
2/28: Handouts given in class. Choose an experiment to try.
3/01: Read pgs. 55-80 in your book. Memorize vocabulary for quiz.
Questions for this lesson:
1. Why is the sky blue?
2. What does Roy G. Biv stand for?
3. What are the primary colors?
4. What are the secondary colors?
5. What happens when you shine white light through a prism?
6. What percentage of the light spectrum can we see?
7. What does RGB stand for?
8. What does CMYK stand for? How is that different from RGB?
9. What color do you get when you mix red and yellow? blue and yellow? blue and red?
10. What is ultraviolet light?