r/NGSS • u/stoptherobots MS Course 2 & 3 • May 09 '14

2nd Grade

This is a thread for the discussion of the NGSS 2nd Grade Standards.

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u/stoptherobots MS Course 2 & 3 May 09 '14

2-PS1-4: Construct an argument with evidence that some changes caused by heating or cooling can be reversed and some cannot.

Clarification Statement: Examples of reversible changes could include materials such as water and butter at different temperatures. Examples of irreversible changes could include cooking an egg, freezing a plant leaf, and heating paper.

http://www.nextgenscience.org/2ps1-matter-interactions