The apparent magnitude of a star is a measure of its... O distance as seen from Earth O brightness as seen from Earth actual brightness

Models are non-visual ways of coummincating how someone thinks about something in the natural world

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

Diffusion and osmosis are forms of passive transport