Level 1

Alaska Science
Key Element C2

A student who meets the content standard should understand that scientific knowledge is validated by repeated specific experiments that conclude in similar results.


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Performance Standard Level 1, Ages 5–7

Students will compare observations and/or repeat observations to check for validity of results.

Sample Assessment Ideas

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Sample Assessment Ideas

  • Students observe unpainted structures made of wood (e.g., sheds, fences); discuss the occurrence of wood shrinkage.

  • Students observe a phenomenon which repeats itself regularly (e.g., dropped ball bounces at a lower height with each successive bounce); compare results with other students for validation.

Standards Cross-Reference red rule

Standards Cross-References
( Alaska Department of Education & Early Development Standards

National Science Education Standards

Scientific investigations involve asking and answering a question and comparing the answer with what scientists already know about the world. (Page 123)

Scientists make the results of their investigations public; they describe the investigations in ways that enable others to repeat the investigations. (Page 123)

Scientists review and ask questions about the results of other scientists’ work. (Page 123)



When a science investigation is done the way it was done before, we expect to get a very similar result. (Page 6)

Science investigations generally work the same way in different places. (Page 6)

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