Some things stay the same while other things change.
Things may change slowly or rapidly. (2.ESS1.1, 2.ESS2.1)
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Change is measured in terms of differences over time and may occur at different rates.
Some systems appear stable, but over long periods of time will eventually change.
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Explanations of stability and change in natural and designed systems can be constructed by examining the changes over time and forces at different scales, including the atomic scale. (6.ESS2.1, 8.PS2.2)
Small changes in one part of a system might cause large changes in another part. (7.LS2.4, 7.LS2.5)
Stability might be disturbed either by sudden events or gradual changes that accumulate over time. (7.ESS3.5)
Systems in dynamic equilibrium are stable due to a balance of feedback mechanisms.
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Much of science deals with constructing explanations of how things change an dhow they remain stable. (CH.PS1.6, B.LS2.6, ES.ESS1.5, ES.ESS1.6, ES.ESS2.7, EN.LS2.6, EN.LS2.7, EN.ESS2.7)
Change and rates of change can be quantified and modeled over very short or very long periods of time. Some systems' changes are irreversible. (EN.ESS3.3)
Feedback (negative or positive) can stabilize or destabilize a system. (B.LS1.3, ES.ESS2.2, EN.ESS2.2, EN.ESS3.4)
Systems can be designed for greater or lesser stability. (PS.PS4.2, PH.PS4.2)
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