Which statement best describes a model using an inflatable ball to show that matter is made up of particles too small to be seen without magnification? It becomes larger as it fills up with air particles.
It becomes smaller as it fills up with air particles.
It becomes lighter as it fills up with air particles.
It becomes darker as it fills up with air particles.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.