ESS1.B: Earth and the Solar System


In this video Paul Andersen explains the parts of the Solar System; including the planets, dwarf planets, moons and asteroids.  He explains how everything orbits around the Sun and how a proper understanding of this heliocentric model helps to explain planetary motions, eclipses, seasons, phases and even day and night.  A teaching progression K-12 is also included.

CCC4: Systems and System Models

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In this video Paul Andersen explains how systems can be used to understand phenomenon in science and create better designs in engineering.  He starts by defining the characteristics of a system and describes how system models can be used to better understand the world.  For example a system model of the water cycle can show the cycling of matter on the surface of the Earth.  He ends with a progression of instruction for a K-12 science classroom.

SEP2: Developing and Using Models

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Paul Andersen explains the importance of modeling in science and engineering.  Models are used by scientists to explain phenomenon.  Unlike mental models, conceptual models can be shared by all scientists to improve our understanding of the Universe.  Engineers use models study systems and test designs.