Logs of Straw , Dendocronology

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Link to Resource: http://www.earthsciweek.org/classroom-activities/logs-straw-dendrocronology
Resource Type:Classroom Activities; Curricula and Instruction
Grade Level:
5 6 7 8 9
Organization:American Geosciences Institute (AGI); Earth Science Week (ESW); United States Geological Survey (USGS)
Summary:Dendrochronologists use tree rings to go back in time to learn more about past climate. Using straws to recreate tree rings, you can learn how dendrochronologists work. Construct a 50-year climatic history on a three-meter time line. In this activity, students use the spacings between tree rings to draw on slips of paper. In those sections, famous climatic and cultural information is added. Students can discuss which rings represent their birth years or other important times in history. Climatic changes (differences in spacing between the rings) should also be discussed. Students should talk about what may have caused those differences (low sunlight or carbon dioxide levels, poor soil, etc).
Earth Science Big Ideas:Big Idea 1; Big Idea 4
NGSS Discplinary Core Ideas:ESS2.D; ESS3.D
NGSS Performance Expectations:5-ESS2-1; HS-ESS2-2; HS-ESS2-4; MS-ESS3-5
NGSS Science and Engineering Practices:Analyzing and interpreting data; Asking questions (for science) and defining problems (for engineering); Developing and using models
NGSS Crosscutting Concepts:Cause and effect: Mechanism and explanation; Stability and change; Systems and system models
Subjects: 6-8; climate; climate change; earth science week; environment; middle school
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