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Next Generation Science Standards (NGSS)
Scale, Proportion, and Quantity
Observable phenomena exist from very short to very long time periods.
Natural objects exist from the very small to the immensely large.
Standard units are used to measure and describe physical quantities such as weight, time, temperature, and volume.
Standard units are used to measure and describe physical quantities such as weight and volume.
Time, space, and energy phenomena can be observed at various scales using models to study systems that are too large or too small.
Proportional relationships (e.g. speed as the ratio of distance traveled to time taken) among different types of quantities provide information about the magnitude of properties and processes.
Phenomena that can be observed at one scale may not be observable at another scale.
The significance of a phenomenon is dependent on the scale, proportion, and quantity at which it occurs.
Using the concept of orders of magnitude allows one to understand how a model at one scale relates to a model at another scale.
Algebraic thinking is used to examine scientific data and predict the effect of a change in one variable on another (e.g., linear growth vs. exponential growth).
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