on.) Give the expert groups time to discuss the main points of their articles and rehearse presentations they will make to their jigsaw group.IV. ExtensionBring students back into their jigsaw groups and ask each student to present his or her year to the group, in order. Encourage others in the group to ask questionsfor clarification.Observe the small and large group interactions. If there are problems, encouragethe leaders to intervene, help as needed by whispering suggestions to them. During the jigsaw group presentations, students take notes on all 6 Cosmic Times.Cosmic TimesJigsaw5
V. Evaluation To assess student’s understanding of Cosmic Times, have students write out a summary of each year, making connections between the discoveries from year-to-year, as appropriate, and/or have students fill out the Walk Through Cosmological Time Worksheet (available on page 7).Walk Through Cosmological Time worksheet answers: 1919: B; 1929: E, F; 1955: C, J; 1965: A, I; 1993: D, G; 2006: H. There are many possible answers forthe questions in the box. Here are just a few possibilities. “Scientists depend on the research and discoveries of previous and other scientists to make new discoveries. Knowledge is built on knowledge. Also, the sophistication of the technologies plays a role in the level of scientific discoveries – new technologies often bring new discoveries, and will influence the sequence of discoveries.”ResourcesAronson, Elliot. (2012) Jigsaw Classroom Education World: “The ‘Jigsaw’ Technique’: Tewksbury, Barbara. (2009) “The Jigsaw Technique” Cosmic TimesJigsaw6
Name: ________________________Date: ________________________Walk Through Cosmological TimeCosmic TimesJigsaw7What connections can you make from this timeline? Is there anything influencing the sequence of discovery? What conclusions might you draw from this?191919191929192919551955196519651993199320062006Using the letter of each scientific term, match the concept to its year of discovery.A. CMBB. RelativityC. Big BangD. CMB Mapping E. Hubble's Law F. Red ShiftG. InflationH. Dark Energy I. Dark Matter J. Supernovae
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