Unit 3: Earth's Place in the Solar System
MS - ESS 1 - 1 Earth's Place in the Universe - Develop and use a model of the Earth-sun-moon system to describe the cyclic patterns of lunar phases, eclipses of the sun and moon, and season.
MS - ESS1 - 2 Role of Gravity in the Galaxy - Develop and use a model to describe the role of gravity in the motions within galaxies and the solar system.