This activity is designed to help building student understanding of how scientific theories can change over time. Science theories change in the face of new evidence. However, when new explanatory frameworks, or theories, are proposed to explain scientific phenomena, there is often a lengthy period during which groups of scientists use different competing theories to explain the same phenomena. During the activity, students are introduced to the geocentric and heliocentric models, students compare the two models, and then observe the time it took to change the theory underpinning the heliocentric model. This activity is part of the "Swift: Eyes through Time" collection that is available on the Teacher's Domain website.


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    Vocational/Professional Development Education,Middle School,NSDL,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-115,Grade 8,The nature of science,Physics,Space Science,oai:nsdl.org:2200/20140407123758403T,Astrophysics,History/Policy/Law,Swift,History of science



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