E2.1

identify components of the solar system, including the Sun, Earth and other planets, natural satellites, comets, asteroids, and meteoroids, and describe their main physical characteristics  

E2.2

distinguish between the concepts of mass and weight

E2.3

describe the relationship between the force of gravity and the weight of a body

E2.4

identify the types of bodies in space that emit light and those that reflect light

E2.5

describe various effects of the relative positions and motions of Earth, the Moon, and the Sun

E2.6

identify various technologies used in space exploration, and describe how technological innovations have contributed to our understanding of space