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WS_Science By You Activity_Fall Foliage_EC

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Page 1 + ward ' s science 5100 West Henrietta Road • PO Box 92912 • Rochester, New York 14692-9012 • p: 800 962-2660 • wardsci.com Find materials for this activity at wardsci.com. Discover more free activities at wardsworld.wardsci.com Fall Foliage Findings Activity Submitted by: Pat S. Recommended Grade Level(s): Appropriate for: Pre-School – Grade 5 Time Requirements: Activity Time: 90 – 120 minutes Teaching Topics & Concepts: • Life Science • First Day of Fall, Living Systems National Science Standards Alignment Can be used to address the following National Science Content Standards in life science: K – 5 Abilities necessary to do scientific inquiry and Understanding about scientific inquiry; 5 – 8 Structure and Function in Living Systems and 5 – 8 Regulation and Behavior. Materials: • A variety of fresh green leaves as described • One small jar for each student • Ethanol (rubbing alcohol) Procedure: What is hiding behind the green? 1. As the leaves turn colors in the fall, have students go out and get a variety of green leaves – Steer the leaf selections (assuring all colors will be represented). In the classroom, the students are divided into teams: RED i.e.maple (anthocyanins), BROWN i.e. oak (tannins), ORANGE i.e. sassafras (carotinoids), and YELLOW i.e. ginkgo (xanthophylls). 2. Shred the leaves and place them into small jars with lids. Add enough alcohol to just cover the leaves. Loosely cover the jars and set them into a shallow pan containing an inch or so of hot tap water. 3. Let the jars sit in the hot water for at least a half hour. Replace the hot water as it cools and swirl the jars from time to time. The jars are "done" when the alcohol has picked up color from the leaves. The darker the color, the brighter the chromatogram will be. 4. Place one strip of filter paper or chromatography paper into each jar, with one end in the alcohol and the other outside of the jar. 5. As the alcohol evaporates, it will pull the pigment up the paper—separating them. 6. After 30–90 minutes (or until the desired separation is obtained), remove the strips of paper and allow them to dry. 7. Identify which pigments are present for each team. Why does everybody have a green pigment? This content is being brought to you by the Ward's World, Science By You program. This program brings lesson and classroom activity ideas directly from science teachers around the nation right to you. From best practices to activities, Science by You offers inspiration for every subject and every grade level. Interested in sharing your own content? Learn how today. PMS200 Black 70% Cool Gray 10 Black Astra Regular get for free from dafont.com • Hot water in a flat pan • Strips of filter paper

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