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SCIENCE & the ARTS

SCIENCE & the ARTS. CHEMICAL vs PHYSICAL CHANGE. Constantine Brancusi, Romanian 1876 - 1957 Mademoiselle Pogany II , 1925 Polished bronze on limestone base 17 x 7 ¼ x 9 3/8 in. Shang dynasty, Anyang period, ca. 12 th – 11 th century BCE Ritual Wine-Pouring Vessel ., ( Guang)

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SCIENCE & the ARTS

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  1. SCIENCE & the ARTS CHEMICAL vs PHYSICAL CHANGE

  2. Constantine Brancusi, Romanian 1876 - 1957 Mademoiselle Pogany II, 1925 Polished bronze on limestone base 17 x 7 ¼ x 9 3/8 in.

  3. Shang dynasty, Anyang period, ca. 12th – 11th century BCE Ritual Wine-Pouring Vessel., (Guang) Bronze,7 ¼ x 8 x 4 13/16 in.

  4. Chemical Change… … change that results in a new material being formed with different physical properties. The change usually cannot be reversed. Patina

  5. Physical Change… … change that results with no new material being formed; physical properties stay the same. The change can be reversed. Nele Azevedo, Brazil Melting Men, 2009 1000 ice carvings Berlin

  6. Physical or Chemical Change? Chemical. When metal that contains iron comes in contact with water and oxygen, a new material called iron oxide (rust) is formed. Aussie Bluey Red Rust Sculpture

  7. Physical or Chemical Change? Physical. The melted form is not a new material—it is still crayon. Also, you can reverse this change by melting the wax and reforming it into a crayon shape. Bob Bonanno, American Rainbow Bridge, 2008 Melted crayons

  8. Physical or Chemical Change? Chemical. As wood burns, carbon is formed. As carbon burns, it combines with oxygen to give off carbon dioxide gas. Burnt wood cannot be returned to its original form. Kanayo Ede, Nigerian Satchmo Burnt wood 24 x 48 in.

  9. Physical or Chemical Change? Physical. No new material is created and this change can be reversed by washing off the paint. Jackson Pollock in his studio

  10. Physical or Chemical Change? Ingrid Falk, Gustavo Aguerre The Toaster Chemical. The dark substance is a new material called carbon that forms when the sugar in the bread is exposed to too much heat.

  11. Form a Hypothesis How can you tell the difference between a chemical and physical change?

  12. Test Your Hypothesis Bag 1: Mix 2 tsp. of borax & 1 tsp. water. Bag 2: Mix 4 tsp. of Elmer’s Glue & 1 tsp. of water. Pour Bag 1 into Bag 2; seal, and mix. Did you observe a physical or chemical change?

  13. Summary How is a chemical change represented by this guang? patina

  14. Summary How is a physical change represented by the melting ice men? No new material is created, and the water can be refrozen.

  15. Reflection How can a background in science help an artist? Dale Chihuly

  16. September Grass by James Taylor Well, the sun’s not so hot in the sky today, And you know I can see summertime slipping on away, A few more geese are gone, a few more leaves turning red, But the grass is as soft as a feather in a featherbed, So I’ll be king and you’ll be queen, Our kingdoms gonna be this little patch of green. http://www.youtube.com/watch?v=QZL-6KyL72k Sue Loder, U.K. Autumn Trees Oil on canvas

  17. Notes • http://www.youtube.com/watch?v=QZL-6KyL72k • James Taylor’s song “September Grass” • Have students identify a physical AND a chemical change mentioned in the lyrics

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