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Observed patterns in nature guide organization and classification and prompt questions about relationships and causes underlying them.

Events have causes, sometimes simple, sometimes multifaceted. Deciphering causal relationships, and the mechanisms by which they are mediated, is a major activity of science and engineering.

In considering phenomena, it is critical to recognize what is relevant at different size, time, and energy scales, and to recognize proportional relationships between different quantities as scales change.

A system is an organized group of related objects or components; models can be used for understanding and predicting the behavior of systems.

Tracking energy and matter flows, into, out of, and within systems helps one understand their system’s behavior.

The way an object is shaped or structured determines many of its properties and functions.

For both designed and natural systems, conditions that affect stability and factors that control rates of change are critical elements to consider and understand.

Cross cutting Concepts

Crosscutting concepts have application across all domains of science. As such, they are a way of linking the different domains of science. They include: Patterns, similarity, and diversity; Cause and effect; Scale, proportion and quantity; Systems and system models; Energy and matter; Structure and function; Stability and change. The Framework emphasizes that these concepts need to be made explicit for students because they provide an organizational schema for interrelating knowledge from various science fields into a coherent and scientifically-based view of the world.

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STEM K12 USA

“Teachers open the door, but you must enter by yourself.”

© 2020 by STEM K12 USA, STEM K12, Astro FInn Science, and related publications are all properties of STEM K12. Created on Editor X. NGSS is a registered trademark of WestEd. Neither WestEd nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of this product, and do not endorse it.”

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