DCI: ESS1.A (B) Earth and its solar system are part of the Milky
Way galaxy, which is one of many galaxies in the universe.
Connections to Nature of Science: Scientific Knowledge Assumes and
Order and Consistency in Natural Systems: Science assumes that objects and
events in natural systems occur in consistent patterns that are understandable
through measurement and observation.
PE: MS-ESS1-2 Develop and use a model to describe the role of
gravity in the motions within galaxies and the solar system.
[Clarification
Statement: Emphasis for the model is on gravity as the force that holds
together the solar system and Milky Way galaxy and controls orbital motions
within them. Examples of models can be physical (such as the analogy of
distance along a football field or computer visualizations of elliptical
orbits) or conceptual (such as mathematical proportions relative to the size of
familiar objects such as students' school or state).] [Assessment Boundary:
Assessment does not include Kepler’s Laws of orbital motion or the apparent
retrograde motion of the planets as viewed from Earth.]
The ideas we see in this standard are:
-Earth and its solar system are in the Milky Way
-The Milky Way galaxy is just one of many galaxies
-Galaxies are collections of stars and star systems and other celestial objects
-Galaxies are held together by gravity
Possible Question Starters:
-"Which of the following is the most accurate description of the relationship between a system and its components within the universe?"
correct answer - a galaxy is made up of many stars and star systems
incorrect answer - star systems are made up of many galaxies
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