ESS2+(5-6)+-6

6a __identifying and comparing the size, location, distances, and movement (e.g. orbit of planets, path of meteors) of the objects in our solar system.__

6b __comparing the composition, atmosphere, and surface features of objects in our solar system.__

What do these GSEs mean? What subtopics do students need to address to understand these GSEs?
6a. constellation, gravitational force, law of universal gravitation, orbit, solar system, astronomical unit, axis, rotation, year, lunar cycle, lunar eclipse, solar sclipse, tide, seasons, scientific notation, weight, mass

Would this include orbital motion, especially orbital retrogrades? 1318532136

6b. planet, terrestrial planets, gas planets, moon, giant impact theory, asteroid, comet, meteor, meteorite, composition of the sun, features of the sun, stars, color, temperature, luminosity, main sequence stars, white dwarf, red giant, supergiant, life cycles of stars,

What ideas to students need to understand before they can address the topics described above?
forces, cycles, gravity, mass sun-centered vs earth-centered universe, Kepler's Laws, inertia, relative sizes, space program, NASA

What misconceptions are students likely to have about these topics?
time, mass, distance, composition, space travel, scientific notation

What phenomena and representations help students understand these topics?
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What activities or activity sequences can be used to address these GSEs?
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