5-ESS1-1 - Support an argument that differences in the apparent brightness of the sun compared to other stars is due to their relative distances from the Earth.

Assessment Boundary - Assessment is limited to relative distances, not sizes, of stars. Assessment does not include other factors that affect apparent brightness (such as stellar masses, age, stage).

5-ESS1-1 - Use observations, first-hand and from various media, to argue that the Sun is a star that appears larger and brighter than other stars because it is closer to Earth.

Assessment Boundary - Other factors that affect apparent brightness (such as stellar masses, age, or stage) are not expected in state assessment.