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South Suburban College Substitute Teacher Class South Suburban College w i l l of f e r a s u b s t i t u t e teacher class beginning in February 2017. The class will be held at South Suburban C ol l e g e M a i n C a m p u s , located at 15800 South State Street, South Holland. The class w i l l teach participants many tech n iques f rom, how to create a lea rning env ironment to teaching st rateg ies work i ng w it h multiple learning styles, to preparing a lesson plan and activities. This class is an excellent sta r t i ng poi nt for t hose interested in a ca reer in education as a substitute te acher a nd i s open to anyone who is interested in exploring the basics of
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- Training Discount available for all programs! Puppy Class - Basic Obedience In Kennel Training
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Contact us at: with this coupon. Expires 4-1-17 6/1/17 with info@pawpalace.com 2739 Glenwood-Dyer Road • Lynwood IL
teaching in the classroom. A workbook is required for this course and is available t h r o u g h t h e C o l l e g e ’s bookstore before the class begins. N o p r i o r t e a c h i n g ex per ience is necessa r y and each participant must be at least 21 years of age and must be a high school graduate. The class will be held on t he fol low i ng Tuesday s, beginning February 14 and running through April 18, from 6:30 p.m. to 8:30 p.m. Please call the Center for Cont inuing educat ion at South Suburban College at (708) 596-2000, ext. #2231 to register. Space is limited, so please register early.
H2O ARLO KALLEMEYN When the temperature d rops ever yone k nows that water turns to ice – and ice f loats in water. This mea ns t hat ice is less dense t ha n water. However, most t h i ngs sh r i n k w hen f roz en – just look at a cold person who w raps up in a big sweater and huddles on t he couch. Conser v ing body heat means getting as small as possible. So why does water expand a nd not s h r i n k w hen it gets cold enoug h to freeze? The answer lies i n t he l it t le hyd rogen atom. A water molecule is made up of one oxygen and t wo hydrogen atoms. W hen water is a liquid, these molecules mix around very closely to one a not her. E ach mole c u le i s at t r ac te d to other by forces called hydrogen bonds. These bonds keep the molecules close toget her but not permanently fixed in one place. As one molecule moves past another it will break old hydrogen bonds and form new ones, with different water molecules. A s water cools, t he molec u les slow dow n, and get closer together. At about 39 deg rees Fa hren heit, water molecules are as closely packed as they can get. W hen water cont inues to cool, t he indiv idua l molecules start to arrange
themselves into a more stable form. At 32 degrees Fa h ren heit w ater w i l l form the stable solid we call ice. Ice, like most other pure solids, has a crystalline st r uct u re. T h is mea ns t hat t he atoms a re orga n i zed i n a si mple repeating structure, like a cube. The cr ystalline s t r u c t u r e of ic e i s a repeating arrangement of eight molecules of water. T h is a r ra ngement is actually less dense than liquid water at 39 degrees! Ice has less molecu les i n t h e s a m e a m ou nt of space compa red to liquid water. This is a very unique property of water, as most chemicals have solid forms that are denser than their liquid forms. This arrangement of hydrogen and oxygen atoms in water is why ice floats. If lakes and rivers froze from the bottom up, it would mean that fish and other wildlife could not survive cold winters – and the spring fishermen would have to make up even bigger fish stories. “W hat good is t he w a r m t h o f s u m m e r, without the cold of winter to give it sweetness.” John Steinbeck Arlo Kallemeyn Shopper Publisher and big fan of the little hydrogen atom.